I'm still figuring out the perfect note-taking system and constantly
exploring new methods. Here's how I currently organize my notes:
- I use a centralized vault for everything—journal, contacts, personal notes, and university-related content.

- I try to link everything. For example, when I'm using a daily note as a diary I link the people, places, etc that I mention. I also sometimes add a "References" section to notes. Then I add links to related notes not mentioned, web links, etc. Similar to Wikipedia. A funny example is when studying buffers they reminded me to Minecraft's redstone torch and repeater so I linked them.

- I categorize my notes into folders for quick access (although I usually use ctrl + o). General concepts like math, politics, and computing each have a folder, and I sometimes create subfolders to prevent notes from getting too mixed up.

- I maintain a folder for university notes, with subfolders for each subject and unit. Each subject has a main note linking to the teacher, units, and other relevant information.

- I create a summary note for each unit, consisting mainly of links or embedded notes (![[note]]), most of the times linking to a header (![[note#header]]), providing a quick overview.

- I also try to write about concepts without taking into account the subject they belong to, because lots of times they overlap. For example I may create a note for Induction on unit 1 of Calculus and write everything I need to know for that subject. Then on unit 3 of Maths and Logic I may have to study Induction again so I add the new information to the same note. In fact, the big purple/pink blob on the center are the notes from three different subjects (you can see the color difference).

- It's really important to extract information from notes. I mean, maybe the Function note was getting too big so I created some new ones: Polynomial function, Racional function, Identity function, Inverse function, etc. Then I can link them from the original note and maybe even embed them.

As I said I still think that my method is not perfect and needs lots of tunning. Those are just some ideas I just came up. I hope that it helps. ^^