The categories on the left were created with [Johnny Decimal](https://johnnydecimal.com/) in mind. I took the concepts of a limited number of folders (10x10, with some flexibility) and use of numerical IDs to sort and locate folders, with numerical IDs assigned based primarily on frequency of use (lower number = higher use). In determining folders, I ended up focusing on the [[Zettelkasten]] system, particularly [[Permanent notes]] and [[Literature notes]]. [[Fleeting notes]] go in root. Outside of those, I knew I needed a separate "Meta" folder, an chronologically-sorted "Events" folder, and a folder for students (that I since expanded to "Contacts"). "NPCs" can probably be changed to "Proper Nouns". Maybe another folder for "phrases, concepts, and topics". [[Alternate numbers and letters for more unique and functional naming]] [[Use folders for types of notes]]