Building a Second Brain: Where to Start

You've heard about the second brain concept. Maybe you watched a video or two, read an article, and thought: "that's for me." Then nothing happened. Too complicated, too many choices, too much time.

This guide is for you. Not the perfect version of a second brain. The minimal version. The one that works in 30 minutes.

What a Second Brain Actually Is

A second brain is a single place where you store what matters: your ideas, reading notes, client resources, reflections on your practice. Nothing more.

The problem it solves: useful information scattered everywhere. In your head, in notebooks, across 12 open browser tabs, in emails you can never find again. The second brain is a central container. Everything goes in, everything comes out easily.

If you are a naturopath, coach, or therapist, here is what it changes in practice: you stop starting from scratch with every client, you find that study you read in 10 seconds, you build a knowledge base that grows with you.

Why Beginners Fail at the Start

Most people who want to build a second brain make the same mistake: they spend 3 hours choosing the right tool. Notion vs Obsidian vs Roam vs Bear. They compare features they will never need. And they never write a single note.

The tool does not matter at the beginning. What matters is building the habit of capturing.

To get started, use the tool you already have. iPhone Notes, Google Keep, or even Google Docs. If you have nothing, use Notion. Free, available on desktop and phone.

The 4 Categories That Are Enough

You do not need a complex system. You need 4 folders. Nothing else.

Resources. Everything you read, watch, or listen to that feels useful for your practice. An article on irritable bowel syndrome. A breathing technique. A book on nonviolent communication. You put it there with a 2-line note: what you are taking away from it.

Clients and Projects. One space per active client, or per ongoing project. No archives for now. Just what is alive right now. If you have 8 clients, you have 8 notes.

Ideas. Everything that passes through your mind. A workshop idea. A question you want to explore. A session format to test. You capture without filtering. Sorting comes later.

Inbox. This is where everything arrives first. No time to file things during the day? Put it in the inbox. Once a week, you sort in 10 minutes into the 3 other folders.

That is it. 4 folders. Not 40.

Your First 30 Minutes

Here is exactly how to start, step by step.

Minutes 1 to 5: open Notion. Create a free account at notion.com. Choose "start from scratch." Ignore all the templates offered.

Minutes 5 to 10: create your 4 pages. Click "+ New page." Name it "Resources." Repeat for "Clients," "Ideas," "Inbox." You have your structure.

Minutes 10 to 20: add your first 3 notes. Open your inbox. Think about the last useful thing you learned, saw, or read this week. Write it down. Title, 3 lines of content, why it is relevant to you. Do this 3 times. It does not need to be perfect. The goal is to feel the mechanics.

Minutes 20 to 30: install the app on your phone. Notion is available on iPhone and Android. Sign in. Now you can capture anywhere, anytime. On your commute, after a session, during a training.

What Goes In, What Stays Out

One question always comes up: do I keep everything?

No. Here is the simple rule: if you will never look at that information again, it is not worth storing. Capture what is actionable, or what answers a real question in your practice.

What goes in: techniques you are testing with clients, resources you recommend regularly, content ideas for your channels, client feedback that makes you think, training notes and key takeaways.

What stays out: articles you find "vaguely interesting," newsletters you do not really read, meeting notes with no decisions. If you are unsure, leave it out.

A lean second brain beats a cluttered one. 50 useful notes are worth more than 500 notes you never read again.

The Only Habit That Matters

Structure means nothing without practice. The minimal habit: one capture per day. An idea, an article, a reflection. Two minutes.

Do that for 30 days and you have 30 notes. In 6 months, you have a real knowledge base. You start seeing connections between your resources. You prepare sessions faster. Content ideas come without searching.

It is not magic. It is accumulated volume.

What Comes Next

If you want to go further and see how to connect your second brain to AI tools to create content, prepare consultations, or automate admin tasks, I offer a free 20-minute call.

We look at your situation together, what is taking time in your day, and what we can simplify.

Book your slot here: https://mthlvr.com/book

-- Mathieu