I’m not using any particular organization strategy like Zettelkasten or PARA or anything. I am using Obsidian for most things, but my to-dos are in Apple Reminders and there are some scattered pieces of information in Google Docs and Notion that I still have yet to migrate to Obsidian.
Obsidian + I have a system where everything is an object and each object is a .md note. No folders. Objects can link to other objects as their type (THE_MATRIX_1999 links MOVIE as its type for example), objects can also be linked like this (related to XYZ, prequel to XYZ) or anything else really. I can create infinite virtual hierarchies this way. I also have a system that randomly reminds me/features certain notes/objects, on da daily basis - so I never forget about a note I may care about forever. I can also adjust how often I want each object to be featured to me from daily all the way up to infinitely rarely.
Obsidian.
I’ve been using LogSeq. The outliner model is extremely powerful and can do a lot, but the exporting capabilities are limited, which pushed me to Emacs, Org and Org Roam, which I am still figuring out.