Building a Mental Health App with Claude Cowork?


This month in our Second Brain Membership, we're tackling one of the biggest reasons Second Brains get cluttered: capturing too much.

It's easy to fall into the trap of saving everything that seems interesting. But more notes don't mean more clarity. They mean more noise, more overwhelm, and a system you stop trusting.

We're going to fix that by helping you define what's actually worth capturing, so your Second Brain stays focused on what matters most.

Here's what we'll work on in the weekly Implementation Sprints:

  • Week 1: Define Your Capture Filters — Get clear on what's actually worth saving by identifying your personal criteria and the questions that drive your best thinking.
  • Week 2: Set Up Your Capture Toolkit — Audit where your best information comes from, spot the gaps, and make sure nothing important slips through the cracks.
  • Week 3: Supercharge Your Capture with AI — Choose from multiple AI-powered workflows to capture, summarize, and organize information faster than ever.
  • Week 4: Fuel Your Next Project — Put your capture skills to work by stocking one active project with everything it needs to move forward.

(You'll also unlock instant access to everything we've covered so far, including past sprints, show & tells, expert workshops, and more.)


I Built a Mental Health App with Claude Cowork (No Coding)

Watch a live experiment: Nico, our video producer, builds a fully functional mood-tracking app with no coding skills — just his Second Brain and Claude Cowork.

He pulls from Cognitive Behavioral Therapy notes saved years ago, hits a few bugs along the way, and ends up with something genuinely usable.

This is what putting your Second Brain to work actually looks like.


How to Create Your Own Luck: 5 Easy Practices

My friend Nir Eyal wrote a guest post for our blog this week about something we've all wondered: why do some people seem to get all the breaks?

Turns out, luck isn't random.

Nir shares research from Dr. Richard Wiseman showing that "lucky" people don't experience more good fortune. They simply notice more of it.

Inside, you'll find a framework for how your beliefs shape what you see, feel, and do, plus five practices to expand what Nir calls your "luck surface area."


Save Less, Use More of What Matters

Most people's Second Brain is stuffed with things they'll never look at again. They save everything "just in case" and end up with a digital graveyard instead of a useful system.

That's why I created the four capture criteria. Before you save something, ask:

  • Is it inspiring?
  • Is it useful?
  • Is it personal?
  • Is it surprising?

These four filters already cut out a lot of noise. But here's where it gets interesting: personalize them.

Your criteria should reflect what you care about right now. Tighten them until they feel almost too strict. It's always better to capture too little than too much, because a bloated system is one you'll stop trusting.

And if you want the simplest possible filter, try this: your active project list. Before saving anything, ask yourself, "Does this help me move a current project forward?" If the answer is no, let it go.

Try this: Use your active project list as your only capture filter for one week. Notice what changes. What did you stop saving that you usually would? Hit reply and let me know.


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Organize your digital life

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Tiago Forte

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