#asknostr What do you use for "personal knowledge management" ie to track notes, diary, car maintenance, and other things you need to remember that are not calendar events? Does it work well? If you've tried other systems, why do you like this one better than others?
Discussion
just make notes of the books etc in your calendar
I use Org mode in Emacs, mainly because it's plain text and I search through years of notes and documents in seconds using find, grep, ripgrep, etc, also trivial to version control plain text.
If I weren't an Emacs user, I would probably use markdown and any text editor. Actually at work, we do just that for our 5 person team.
Nowadays there are also nice (cross-platform) systems to organise markdown notes, like LogSeq or Obsidian.