i have to use jira at work. it's more so there's some traceability to my work and letting people know when im done with the generic weekly performance/qa tasks and shite, but it does also let me dismiss people shoulder tapping for random features like "put it in the backlog binch".
fb reminds me of things i want to go to sometimes, and i use keep for heaps of random notes i sometimes tag for cleanliness but it's mostly a brain dump.
also of note: letterboxd, discogs, spotify, gcal, slack /remind, and my memory