TL;DR

Three Levels of Notes

Not every piece of information deserves the same effort. Matching your approach to the importance of what you're capturing is the first step to a system that doesn't collapse under its own weight.

Fleeting Notes
Quick captures, a passing thought, a single interesting fact, a reminder. Don't worry about format. The goal is to get it out of your head before you forget it. Apple Notes, Google Keep, or a pocket notebook all work.
Literature Notes
When you're reading a book or attending a lecture, don't transcribe. Summarize the main ideas in your own words. If you can't explain a concept simply after reading about it, you haven't understood it yet, which is useful information.
Permanent Notes
Taking a concept and connecting it to something you already know. This is where real understanding gets built. Example: linking a psychology concept about how we rationalize choices to a marketing idea about consumer behavior.

The PARA Method

PARA is a system for organizing all your digital files, notes, and information. It was designed to work across any app, Notion, Google Drive, your email, your phone. The key is that everything you own has a home in one of four categories.

P

Projects

Things you're actively working on with a deadline. A term paper, a job application, a work project. Each one has a specific outcome and an end date. When it's done, it moves to Archives.

A

Areas

Ongoing responsibilities that don't end. Health, finances, car maintenance, career development. There's no deadline, just a standard you're trying to maintain over time.

R

Resources

Topics and interests you want to keep for the future but aren't actively working on. Cooking recipes, a programming language you want to learn, ideas for a future project. Reference material you might return to.

A

Archives

Completed projects and things you no longer need but don't want to delete. Keeping old work out of your active view reduces clutter without losing anything permanently.

Paper vs. Digital

There's no universally correct answer here. The evidence on handwriting suggests it improves retention compared to typing, writing by hand forces more active processing. But digital notes are searchable, which is enormously valuable when you need to find something from two years ago.

A practical middle ground: brainstorm, sketch, and work through complex problems on paper. Then capture the key conclusions and decisions in your digital system for long-term storage.

The Collector's Trap

The most common failure mode in knowledge management is collecting information without processing it. Bookmarking an article, saving a PDF, favoriting a tweet, these feel like progress, but they aren't. If you didn't do anything with the information, you don't have it.

Two habits that prevent this:

Done is better than perfect

A messy note that you can find in a search is more valuable than a perfectly organized note you never took because it felt like too much work. The goal is a system you'll actually use, not one that looks impressive.

Tools Worth Knowing

Apple Notes / Google Keep
Fast, always available, and good enough for fleeting notes. Don't overthink the capture stage.
Notion
Flexible all-in-one workspace for notes, tasks, and databases. Good for building a PARA system. Can become over-complicated if you let it.
Obsidian
Built for connecting ideas through links. Good for people who want to build a "second brain" where concepts reference each other. Works offline and stores everything locally. Steeper learning curve than most apps.
Todoist / TickTick
Task managers rather than note-takers. Useful as the action layer on top of a note system, where you track what you need to do rather than what you know.