My go to way of taking notes is sending messages to myself. Previously with Signal’s “Note to self” and now with my own channel with Element. It is fast way of taking notes, but horrible in long run since you cannot group notes or add tags or anything else that you would expect from good note taking tool. I have Nextcloud notes, but I still do it since I am used to it and it is fast way of syncing notes with mobile and PC. Anyone else has interesting ways of keeping notes?
I think my way is far worse: I write in an unsynced plain text note app on my phone, and then when I need it on my computer, Share > KDE Connect > copy & paste into a text editor.
(I gave Joplin a quick try but didn’t like the non-WYSIWYG-ness on the phone.)