Folder trees are where notes go to die
Picture the average knowledge worker's file system: a folder tree nested eight levels deep, organized by topic. Work, then Project X, then Research, then Articles, then 2024, then Industry, then Competitive Analysis, then Notes. Two hundred files sitting in that last folder, waiting.
The system promises you'll find things later. It doesn't deliver. Getting a note back out costs more than putting it in did, because retrieval means reconstructing a categorization decision you made months ago and have since forgotten.
Tiago Forte's PARA method, laid out in his book Building a Second Brain, fixes this by changing what you sort by. Instead of topic, you sort by how close something is to action. And instead of infinite folders, you get exactly four.
The four buckets
Projects. Time-bound outcomes with a clear finish line. "Launch the new website by Q3." "Finish thesis chapter 3 by April 30." Projects end.
Areas. Ongoing responsibilities with no end date, standards you maintain rather than outcomes you achieve. "Health." "Finances." "Managing the team." Areas don't end, they just continue.
Resources. Topics you're interested in, reference material you want on hand. Neutral until you need it. "Productivity." "Machine learning." Anything worth keeping around without being tied to something you're actively doing.
Archives. Everything inactive. Finished projects, resources you no longer care about. Still searchable, just out of sight.
That's the whole system. Four buckets, and every note lives in exactly one of them.

Why sorting by distance to action beats sorting by topic
Take a note about exercise. Where does it belong? That depends entirely on your life right now, not on the topic itself.
If you're training for a marathon, it's a Project. If it's just part of how you live day to day, it's an Area. If you're generally curious about exercise science but not doing anything with it, it's a Resource. If you used to run and don't anymore, it's an Archive.
Notice the topic never told you where to file it. Your current relationship to the topic did, and that's a fast decision because it depends on your life, not on some taxonomy you have to remember.
Compare that to a folder tree: "I think it was under Work, or maybe Personal, definitely from 2024..." Twenty guesses, most of them wrong.
Projects are the bucket that actually runs your day

Here's the part people miss: Projects should get most of your daily attention, because they're the most active bucket by design. Areas move slower. Resources sit passively until you need them. Archives almost never come up at all.
Your day-to-day workflow should mostly live in Projects. Areas get checked weekly. Resources get pulled up when something specific calls for them. Archives you basically forget exist, until you need to dig something up.
What happens when a project finishes

When a project wraps up, it doesn't just vanish. It splits three ways:
- Anything reusable, templates, frameworks, moves to Resources.
- Any standard or practice that emerged from the work moves to the relevant Area.
- Everything else, the specifics that only mattered to that one project, moves to Archives.
After that split, Projects only contains what's actually active. The workspace stays small on purpose.
Where people trip up
Treating aspirations as projects. "Write a book" isn't a project, it's a fantasy with no finish line. "Finish the first draft of chapter one by February 15" is a project.
Mixing up Areas and Projects. "Get healthier" is an Area. It never really ends. "Run a half-marathon by May" is a Project. It has a date.
Turning Resources into a junk drawer. Be picky about what goes in. If you wouldn't deliberately reread it a year from now, it belongs in Archives instead.
Where TaskCoach.AI fits in
Spaces in TaskCoach.AI are basically PARA's Projects bucket made into a first-class feature: each Space bundles the goals, tasks, calendar, focus sessions, and notes tied to one specific project.
Habits live in the Areas layer, ongoing standards rather than outcomes with a deadline. Notes cover the Resources layer through its knowledge graph. And Archive quietly moves finished Spaces out of your way once they're done.
None of that overlap is an accident. The whole structure runs on the same logic PARA does.
The bottom line
Four buckets, sorted by how close something is to action, not by what it's about.
Projects are outcomes with a deadline. Areas are standards with no deadline. Resources are things worth keeping around. Archives are everything you're done with.
If your notes feel like a graveyard right now, the topic tree is probably why. Sort by action distance instead, and the graveyard turns back into something you can actually use.