Building a Second Brain: A Proven Method to Organize Your Digital Life and Unlock Your Creative Potential

We spend countless hours reading, listening to, and watching other people’s opinions about what we should do, how we should think, and how we should live, but make comparatively little effort applying that knowledge and making it our own. So much of the time we are “information hoarders,” stockpiling endless amounts of well-intentioned content that only ends up increasing our anxiety.

To be able to make use of information we value, we need a way to package it up and send it through time to our future self.

a digital archive of your most valuable memories, ideas, and knowledge to help you do your job, run your business, and manage your life without having to keep every detail in your head. Like a personal library in your pocket, a Second Brain enables you to recall everything you might want to remember so you can achieve anything you desire.

Your mind is for having ideas, not holding them. —David Allen, author of Getting Things Done

Information is the fundamental building block of everything you do.

Instead of empowering us, this deluge of information often overwhelms us. Information Overload has become Information Exhaustion, taxing our mental resources and leaving us constantly anxious that we’re forgetting something.

Resurrecting the commonplace book allows us to stem the tide, shifting our relationship with information toward the timeless and the private.

This digital commonplace book is what I call a Second Brain. Think of it as the combination of a study notebook, a personal journal, and a sketchbook for new ideas.

For modern, professional notetaking, a note is a “knowledge building block”—a discrete unit of information interpreted through your unique perspective and stored outside your head.

if a piece of content has been interpreted through your lens, curated according to your taste, translated into your own words, or drawn from your life experience, and stored in a secure place, then it qualifies as a note.

You are on your smartphone just like everyone else, but you aren’t doing what they are doing. You are creating value instead of killing time.

you already have a formidable collection of notes ready and waiting: the ideas, strategies, objectives, challenges, questions, concerns, contributions, and reminders you’ve collected over just a few hours on a Monday morning.

There are four essential capabilities that we can rely on a Second Brain to perform for us: Making our ideas concrete. Revealing new associations between ideas. Incubating our ideas over time. Sharpening our unique perspectives.

Digital notes aren’t physical, but they are visual. They turn vague concepts into tangible entities that can be observed, rearranged, edited, and combined together.

Now imagine if you were able to unshackle yourself from the limits of the present moment, and draw on weeks, months, or even years of accumulated imagination.

Having a Second Brain where lots of ideas can be permanently saved for the long term turns the passage of time into your friend, instead of your enemy.

It always means, not that I can’t find the right words, [but rather] that I don’t have the ammunition.”7

Introducing The CODE Method: The Four Steps to Remembering What Matters To guide you in the process of creating your own Second Brain, I’ve developed a simple, intuitive four-part method called “CODE”—Capture; Organize; Distill; Express.

Capture: Keep What Resonates Every time we turn on our smartphone or computer, we are immediately immersed in the flow of juicy content they present.

The solution is to keep only what resonates in a trusted place that you control, and to leave the rest aside.

Organize: Save for Actionability Once you’ve begun capturing notes with the ideas that resonate with you, you’ll eventually feel the need to organize them.

The best way to organize your notes is to organize for action, according to the active projects you are working on right now. Consider new information in terms of its utility, asking, “How is this going to help me move forward one of my current projects?”

Distill: Find the Essence Once you start capturing ideas in a central place and organizing them for action, you’ll inevitably begin to notice patterns and connections between them.

distill your notes down to their essence. Every idea has an “essence”: the heart and soul of what it is trying to communicate.

Every time you take a note, ask yourself, “How can I make this as useful as possible for my future self?” That question will lead you to annotate the words and phrases that explain why you saved a note, what you were thinking, and what exactly caught your attention. Your notes will be useless if you can’t decipher them in the future, or if they’re so long that you don’t even try. Think of yourself not just as a taker of notes, but as a giver of notes—you are giving your future self the gift of knowledge that is easy to find and understand.

Express: Show Your Work All the previous steps—capturing, organizing, and distilling—are geared toward one ultimate purpose: sharing your own ideas, your own story, and your own knowledge with others.

What is the point of knowledge if it doesn’t help anyone or produce anything?

A common challenge for people who are curious and love to learn is that we can fall into the habit of continuously force-feeding ourselves more and more information, but never actually take the next step and apply it.

Information becomes knowledge—personal, embodied, verified—only when we put it to use. You gain confidence in what you know only when you know that it works. Until you do, it’s just a theory.

All these actions—evaluate, share, teach, record, post, and lobbyVI—are synonyms for the act of expression.

Just as with the food we put into our bodies, it is our responsibility and right to choose our information diet.

You are what you consume, and that applies just as much to information as to nutrition.

there is a process they follow for regularly turning new ideas into creative output.

Creativity depends on a creative process.

How can creativity emerge out of chaos?—still

It starts with realizing that in any piece of content, the value is not evenly distributed. There are always certain parts that are especially interesting, helpful, or valuable to you.

The best curators are picky about what they allow into their collections,

Curator’s Perspective—that we are the judges, editors, and interpreters of the information we choose to let into our lives.

Capture Criteria #1: Does It Inspire Me? Inspiration is one of the most rare and precious experiences in life.

Capture Criteria #2: Is It Useful?

Sometimes you come across a piece of information that isn’t necessarily inspiring, but you know it might come in handy in the future.

Capture Criteria #3: Is It Personal? One of the most valuable kinds of information to keep is personal information—your own thoughts, reflections, memories, and mementos.

“emotions organize—rather than disrupt—rational thinking.”8 When something resonates with us, it is our emotion-based, intuitive mind telling us it is interesting before our logical mind can explain why.

Your Second Brain gives you a place to corral the jumble of thoughts tumbling through your head and park them in a waiting area for safekeeping.

the Cathedral Effect.2 Studies have shown that the environment we find ourselves in powerfully shapes our thinking.

PARA,I which stands for the four main categories of information in our lives: Projects, Areas, Resources, and Archives.

it organizes information based on how actionable it is, not what kind of information it is.

dedicated places for each of the main “areas” of your life that you are responsible for, and “resources,” which is like a personal library of references, facts, and inspiration.

Projects: Short-term efforts in your work or life that you’re working on now. Areas: Long-term responsibilities you want to manage over time. Resources: Topics or interests that may be useful in the future. Archives: Inactive items from the other three categories.

Even though areas have no final outcome, it is still important to manage them. In fact, if you look at the list above, these areas are critical to your health, happiness, security, and life satisfaction. While there is no goal to reach, there is a standard that you want to uphold in each of these areas.

The third category of information that we want to keep is resources. This is basically a catchall for anything that doesn’t belong to a project or an area and could include any topic you’re interested in gathering information about.

Here’s an example of what the folders in my notes app look like with PARA:

Most notes apps have an “inbox” or “daily notes” section where new notes you’ve captured are saved until you can revisit them and decide where they belong. Think of it as a waiting area where new ideas live until you are ready to digest them into your Second Brain.

The four main categories are ordered by actionability to make the decision of where to put notes as easy as possible: Projects are most actionable because you’re working on them right now and with a concrete deadline in mind. Areas have a longer time horizon and are less immediately actionable. Resources may become actionable depending on the situation. Archives remain inactive unless they are needed. This order gives us a convenient checklist for deciding where to put a note, starting at the top of the list and moving down: In which project will this be most useful? If none: In which area will this be most useful? If none: Which resource does this belong to? If none: Place in archives.

In other words, you are always trying to place a note or file not only where it will be useful, but where it will be useful the soonest.

PARA isn’t a filing system; it’s a production system. It’s no use trying to find the “perfect place” where a note or file belongs. There isn’t one. The whole system is constantly shifting and changing in sync with your constantly changing life.

set my intentions, craft a strategy, and look for sources of leverage that would allow me to accomplish things with minimal effort.

We can also use our notes to drill down to the essence of the stories, research, examples, and metaphors that make up our own source material.

distill your message down to the key points and action steps.

Here is a snapshot of the four layers of Progressive Summarization:II

“layer one”—the chunks of text initially captured in my notes.

in making decisions about what to keep, we inevitably have to make decisions about what to throw away. You cannot highlight the main takeaways from an article without leaving some points out.

The rule of thumb to follow is that every time you “touch” a note, you should make it a little more discoverable for your future selfVII—by

Verum ipsum factum (“We only know what we make”) —Giambattista Vico, Italian philosopher

As knowledge workers, attention is our most scarce and precious resource.

The final stage of the creative process, Express, is about refusing to wait until you have everything perfectly ready before you share what you know. It is about expressing your ideas earlier, more frequently, and in smaller chunks to test what works and gather feedback from others.

Our creativity thrives on examples. When we have a template to fill in, our ideas are channeled into useful forms instead of splattered around haphazardly.

The fundamental difficulty of creative work is that we are often too close to it to see it objectively. Getting feedback is really about borrowing someone else’s eyes to see what only a novice can see. It’s about stepping outside your subjective point of view and noticing what’s missing from what you’ve made.

To truly “know” something, it’s not enough to read about it in a book. Ideas are merely thoughts until you put them into action. Thoughts are fleeting, quickly fading as time passes. To truly make an idea stick, you have to engage with it.

endlessly creative first brain can do what it does best. Imagine. Invent. Innovate. Create.

Building a Second Brain is really about standardizing the way we work, because we only really improve when we standardize the way we do something.

Through the simple acts of capturing ideas, organizing them into groups, distilling the best parts, and assembling them together to create value for others,

The purpose of divergence is to generate new ideas, so the process is necessarily spontaneous, chaotic, and messy.

Convergence forces us to eliminate options, make trade-offs, and decide what is truly essential.

Write down ideas for next steps: At the end of a work session, write down what you think the next steps could be for the next one. Write down the current status: This could include your current biggest challenge, most important open question, or future roadblocks you expect. Write down any details you have in mind that are likely to be forgotten once you step away: Such as details about the characters in your story, the pitfalls of the event you’re planning, or the subtle considerations of the product you’re designing. Write out your intention for the next work session: Set an intention for what you plan on tackling next, the problem you intend to solve, or a certain milestone you want to reach.

“What is the smallest version of this I can produce to get useful feedback from others?”

Your Second Brain is a practical system for enhancing your productivity and your creativity.

Building a Second Brain is not just about downloading a new piece of software to get organized at one point in time; it is about adopting a dynamic, flexible system and set of habits

The three habits most important to your Second Brain include: Project Checklists: Ensure you start and finish your projects in a consistent way, making use of past work. Weekly and Monthly Reviews: Periodically review your work and life and decide if you want to change anything. Noticing Habits: Notice small opportunities to edit, highlight, or move notes to make them more discoverable for your future self.

This is where the Project Kickoff Checklist comes in. Here’s my own checklist: Capture my current thinking on the project. Review folders (or tags) that might contain relevant notes. Search for related terms across all folders. Move (or tag) relevant notes to the project folder. Create an outline of collected notes and plan the project.

Here are some questions I use to prompt this initial brainstorm: What do I already know about this project? What don’t I know that I need to find out? What is my goal or intention? Who can I talk to who might provide insights? What can I read or listen to for relevant ideas?

Here’s my checklist: Mark project as complete in task manager or project management app. Cross out the associated project goal and move to “Completed” section. Review Intermediate Packets and move them to other folders. Move project to archives across all platforms. If project is becoming inactive: add a current status note to the project folder before archiving.

Here are some other items you can include on your Project Completion Checklist. I encourage you to personalize it for your own needs: Answer postmortem questions: What did you learn? What did you do well? What could you have done better? What can you improve for next time? Communicate with stakeholders: Notify your manager, colleagues, clients, customers, shareholders, contractors, etc., that the project is complete and what the outcomes were. Evaluate success criteria: Were the objectives of the project achieved? Why or why not? What was the return on investment? Officially close out the project and celebrate: Send any last emails, invoices, receipts, feedback forms, or documents, and celebrate your accomplishments with your team or collaborators so you receive the feeling of fulfillment for all the effort you put in.

He described a Weekly Review as a regular check-in, performed once a week, in which you intentionally reset and review your work and life.

Review to write down any new to-dos, review your active projects, and decide on priorities for the upcoming week. I suggest adding one more step: review the notes you’ve created over the past week, give them succinct titles that tell you what’s inside, and sort them into the appropriate PARA folders.

I keep this checklist on a digital sticky note on my computer, so I can easily refer to it. Clear my email inbox. Check my calendar. Clear my computer desktop. Clear my notes inbox. Choose my tasks for the week.

Monthly Review Template: Reflect for Clarity and Control While the Weekly Review is grounded and practical, I recommend doing a Monthly Review that is a bit more reflective and holistic. It’s a chance to evaluate the big picture and consider more fundamental changes to your goals, priorities, and systems that you might not have the chance to think about in the busyness of the day-to-day. Here’s mine: Review and update my goals. Review and update my project list. Review my areas of responsibility. Review someday/maybe tasks. Reprioritize tasks.

Keep what resonates (Capture) Save for actionability (Organize) Find the essence (Distill) Show your work (Express)

Each one of them is a starting point to begin establishing the habits of personal knowledge management in your life: Decide what you want to capture. Think about your Second Brain as an intimate commonplace book or journal. What do you most want to capture, learn, explore, or share? Identify two to three kinds of content that you already value to get started with. Choose your notes app. If you don’t use a digital notes app, get started with one now. See Chapter 3 and use the free guide at Buildingasecondbrain.com/resources for up-to-date comparisons and recommendations. Choose a capture tool. I recommend starting with a read later app to begin saving any article or other piece of online content you’re interested in for later consumption. Believe me, this one step will change the way you think about consuming content forever. Get set up with PARA. Set up the four folders of PARA (Projects; Areas; Resources; Archives) and, with a focus on actionability, create a dedicated folder (or tag) for each of your currently active projects. Focus on capturing notes related to those projects from this point forward. Get inspired by identifying your twelve favorite problems. Make a list of some of your favorite problems, save the list as a note, and revisit it any time you need ideas for what to capture. Use these open-ended questions as a filter to decide which content is worth keeping. Automatically capture your ebook highlights. Set up a free integration to automatically send highlights from your reading apps (such as a read later or ebook app) to your digital notes (see my recommendations at Buildingasecondbrain.com/resources). Practice Progressive Summarization. Summarize a group of notes related to a project you’re currently working on using multiple layers of highlighting to see how it affects the way you interact with those notes. Experiment with just one Intermediate Packet. Choose a project that might be vague, sprawling, or simply hard, and pick just one piece of it to work on—an Intermediate Packet. Maybe it is a business proposal, a chart, a run of show for an event, or key topics for a meeting with your boss. Break the project down into smaller pieces, make a first pass at one of the pieces, and share it with at least one person to get feedback. Make progress on one deliverable. Choose a project deliverable you’re responsible for and, using the Express techniques of Archipelago of Ideas, Hemingway Bridge, and Dial Down the Scope, see if you can make decisive progress on it using only the notes in your Second Brain. Schedule a Weekly Review. Put a weekly recurring meeting with yourself on your calendar to begin establishing the habit of conducting a Weekly Review. To start, just clear your notes inbox and decide on your priorities for the week. From there, you can add other steps as your confidence grows. Assess your notetaking proficiency. Evaluate your current notetaking practices and areas for potential improvement using our free assessment…