Building a Second Brain That Works in Real Life

7 minute read

You know you saved it somewhere. Perhaps it was in your phone notes, a notebook, an email to yourself or that folder you created with every intention of keeping it organised. But when you need it, you can’t quite remember where to look.

A Second Brain offers a way to bring useful information, ideas and reminders into a trusted external system, helping us rely less on memory alone. Yet setting one up is only the beginning. How do we make sure it helps us in everyday life? And what happens when the system we carefully created becomes another thing to maintain?

The aim is to make it easier to find what matters and use it to move forward. APDO member Julia Jamieson explores how to create your second brain by starting with a clear purpose, testing a small change and then recognising the points where a system needs adjusting.

Because a useful Second Brain should help lighten your mental load, rather than add to your to-do list.

What is a Second Brain?

A Second Brain is a trusted external system for capturing, organising, retrieving and using information. It gives useful ideas, notes and resources a home so that you can find them when you need them, without trying to remember everything yourself.

You may already have parts of one: a notebook for ideas, folders for important documents or an app for meeting notes. The question is whether those pieces work together and help you do what matters.

Your Second Brain doesn’t have to live in one app. It might combine paper and digital tools, depending on what feels accessible and practical for you. What matters is knowing where information belongs and being able to retrieve it. 

Author Tiago Forte’s Building a Second Brain approach introduces a framework called CODE, which describes four stages:

• Capture: Keep information and ideas that resonate with you or could serve a useful purpose.
• Organise: Arrange what you keep so that it supports your projects and responsibilities.
• Distil: Draw out the most useful points, making them easier to understand and revisit.
• Express: Use that information to create something, make a decision or complete a piece of work.

There is no requirement to save everything or build an elaborate dashboard. A manageable collection of information you regularly use can be more helpful than an extensive archive you rarely open.

Design: Start with what you need the system to do

A good starting point is your everyday life. Where are you repeatedly searching for information, forgetting an action or carrying something in your head because you do not trust yourself to find it again?

Before building or changing your Second Brain, ask:

• What must this system help me do?
• What mental load should it remove?
• What information do I need to retrieve?
• When and where will I use it?
• What would working well look like?

Be as specific as you can. “I want to be more organised” is understandable, but “I want to find my client notes before each appointment” gives you something concrete to design around.

If you’re someone who naturally reaches for a notebook you may need a simple way to review notes and transfer actions. If you capture ideas on your phone you may benefit from a clearly named digital inbox. Understanding what you already do helps you create a system you can realistically use.

Consider the conditions in which the system will be used, too. Can you capture something quickly between appointments? Can you find it from your phone? 

Test: Start with one real problem and a clear outcome before moving everything

Once you have identified what your Second Brain needs to help you do, give it a small, practical trial. Treat your first version as an experiment, with room to make adjustments as you learn. Once you know what the system needs to help you achieve, choosing the tools and structure becomes much easier.

Choose one active project and use your proposed system to hold the relevant information, then see how it performs as the project progresses.

Pay attention to a few questions:

• Can I add information quickly, without wondering where it belongs?
• Can I find what I need when I return to the project?
• Are the next actions clear and easy to see?
• Am I duplicating information or repeatedly moving it between places?

Any hesitation is useful information. If you keep forgetting to open a particular app, or a folder structure makes filing feel laborious, you have found something to adjust. A smaller test lets you learn before committing to a bigger change.

Troubleshoot: Find the friction point

What happens when you stop using your system? Perhaps notes pile up, your digital inbox goes untouched or you return to writing reminders on whichever scrap of paper is closest.

A friction point is the specific moment at which using the system becomes harder than ignoring it.

To find the friction, follow a piece of information through your system:

• Capture: Is it easy to record, or does it take too many steps?
• Process: Do you have a regular opportunity to decide what needs action and what is worth keeping?
• Organise: Is its destination clear, or are there too many choices?
• Retrieve: Can you find it using the words or details you naturally remember?
• Use: Does it support something you need to do, decide or create?

Look for the first point where progress stalls. If capturing works well but information is never reviewed, adding another capture tool is unlikely to help. 

Choose one friction point to address first. Making a title clearer, reducing the number of filing destinations or giving tasks a visible home may be enough to make the next step easier.

Five principles for a more usable Second Brain

Once you have identified where friction appears, a few simple design principles can help you make useful adjustments. Apply them in ways that suit your habits, responsibilities and capacity.

1. Create one front door

Give new information one main place to enter your system, or a small number of places with clearly defined purposes. This reduces the decisions you need to make when capturing something quickly.

Ask yourself: When something new comes in, do I know where to put it?

2. Separate action from information

Meeting notes, useful articles and project documents provide context. Tasks tell you what needs doing, while calendar entries reserve time or record dated commitments.

These can be connected, but actions need to be visible. 

Ask yourself: Can I see what needs doing without searching through my reference material?

3. Organise around use

Organising around current projects and ongoing responsibilities gives information a practical context. Categories can stay broad enough to make filing straightforward.

When deciding where something belongs, ask: “When will I need this?”

4. Make retrieval easy

Use titles that will mean something to you later. Include relevant dates and words you are likely to search for. Keep folders and tags manageable: each additional category creates another filing decision.

Ask yourself: Would I know how to find this in a month’s time?

5. Design for the difficult week

Your system needs to remain accessible when you are busy, tired, distracted or returning after an interruption. Consider which steps are essential and which you could simplify.

You should be able to identify what needs attention without first sorting an entire backlog.

Try this question: “Could I restart this system after ignoring it for three weeks?”

Apply: What could I do differently?

To explore how these principles work in practice, a useful first question is: “What do you most need your system to help you do right now?”

Knowing this gives you a clear focus and makes it possible to assess whether a change is helping.

Start with one active project: there is no need to migrate the entire archive to test whether this process helps.

The value of a Second Brain becomes visible when information supports an action, a decision, a conversation or a completed project. 

Try your own two-week experiment

Think about one part of your own system that could work more smoothly. 

Choose one recurring frustration and one small change to test over the next two weeks. Keep the experiment manageable enough to fit into your usual routine.

Use these prompts to give it a clear purpose:

The problem I want to reduce is:

The small change I will test is:

I will use it for:

I will review it on:

I will know it is helping if:

At your review, ask what became easier, where you still hesitated and whether the change was manageable during a busy week. You can then keep it, adapt it or try a different approach.

Less friction, more confidence.

A useful Second Brain gives you somewhere to put what matters, a way to find it again and a clear connection to what you need to do. It will evolve as your projects, responsibilities and capacity change.

Start with a real need, test a manageable change and pay attention to where things become difficult. 

Over time, small improvements can make it easier to trust that important information is recorded and available. That means less searching, fewer things to hold in your head and more confidence when it is time to act.

Your Second Brain does not need to hold everything. It needs to help you think, decide and act with less friction.

What is one thing you could simplify in your system this week?

If you would like support and encouragement from a Professional Declutterer and Organiser to help reduce your mental load and give you more confidence, check out our member's directory today.