I like @bobjonkman's file & directory naming technique. I don't know that I'd use it for _everything_, but I tend to name self-generated media files with their #ISO8601 date as the beginning of their name and to have a directory structure of:
YYYY
|
-> MM
|
-> DD

See: https://gs.jonkman.ca/notice/967378 (which may not arrive here until mid-September).