Building a Second Brain With AI — How To (Practical Tutorial)

It's 2025. Almost 2026.

Most apps out there are outdated, and don't utilize the power of AI for building your Second Brain.

Most of them are built for other purposes, yet people started using them as Second Brain apps because they had no choice.

Finally, the true AI-powered Second Brain is here.

Where everything is auto-organized and linked with AI - allowing you to pull insights and be productive as never before.

What is Second Brain, really?

Second Brain is an AI-powered knowledge base, that's auto-organized.

Imagine dropping everything you have there; it automatically categorizes, and it's very easy to find.

In addition, everything is linked with AI. Whatever is inside can be pulled to the AI chat context.

If you want to "AI chat" with everything you ever did about #marketing (or any other topic), it's very simple.

You can combine topics, or manually organize them further if you need extra flexibility. There are very flexible projects inside Second Brain, that you can manually create and drop content inside (something like a smart AI-chattable folder).

What is so unique about this Second Brain?

This app is built to be exactly that - Second Brain - using the most powerful tech available.

There are:

• Auto-organization of content
• Unique things in AI chat context: YouTube videos, Instagram Reels, TikToks, LinkedIn posts, Looms (besides regular websites, PDFs, etc)
• AI Visual Board: completely reimagined AI chat, with multiple chat nodes, context, and Notion-like pages in front of you, on an infinite AI canvas
• Live web search and combining your knowledge base with live AI web search

But how to build it?

At the start, it's very simple.

Keep dropping everything you see/want/have inside Second Brain - everything is processed for AI and auto-organized.

You can also use Second Brain Chrome Extension, to save screenshots, websites, etc. across the web - to Second Brain, with 1 click.

You can further organize things manually and adjust "auto-organization", if sometimes needed.

Saving AI chat responses

When using a tool like ChatGPT, all your knowledge is lost in threads.

And if you want to store the knowledge somewhere, you need extra tools like Notion, Google Docs, notes, etc.

But then, everything is all over the place, and you're not really building a real knowledge base, and using AI to interact with it.

That's why in Second Brain, you can save AI chat responses with 1 click, to editable, Notion-like pages.

And every time you do something new, your Brain can be aware of old things - allowing you to build a very powerful knowledge base and build on top of it.

What do you mean by "chatting with social media"?

Social media contains a lot of wisdom (when you know where to search).

There are tons of great YouTube long-form videos, LinkedIn posts, but even short videos like TikToks, Instagram Reels, and YouTube Shorts.

However, you don't always really feel like watching them, especially if they're long and complex.

And if you've ever tried to paste one of these into ChatGPT and ask something like "summarize the content", "explain it better to me", or "apply the knowledge to my problem" - you noticed it didn't work.

ChatGPT doesn't understand that content. Second Brain does.

That means you can ask anything about that YouTube video.

You can combine it with some PDFs in your knowledge base, and maybe even with those Notion-like documents.

There are no limitations in Second Brain to what you can link and combine with AI.

What is an AI Visual Board?

It's a new AI chat experience.

When using something like ChatGPT, you have a 1 chat, and that's about it.

But AI Visual Board allows you to have multiple chats, context, and Notion-like pages in front of you all the time.

And of course, everything is AI-chattable.

Makes it so much easier to work on a project, because you don't need to switch between 7 different tabs and tools and constantly copy-paste.

Nah. Everything's in front of you, all the time.

The more you use it, the better it gets

After some time, you will get a list of categories that look something like this:

All of them are auto-generated, when you drop different things into Second Brain, save AI chat responses, and similar.

That's your knowledge base.

Click on any of the categories, and start an AI chat with it.

Combine it with some other category.

Or even, drop more context to it.

Whatever is inside your AI knowledge base, can be pulled to the AI chat context.

The more you have, the more powerful the responses are.

No need to "remind" AI about anything.

It knows. And it can pull very powerful insights.