this is how i organized my music library (mp3 files):

1. i deleted thousands of tracks and albums that don’t inspire me/are not to my taste/make me feel bad/...

2. i renamed all files to the following format: “%artist – %title.mp3”

3. i moved all files to single folder named “music”

4. i used utils like mp3renamer, musicbrainz tagger, etc to fetch tags from the internet and tag all the files

5. now whenever i listen to music in amarok, i add tags to tracks i listen to. i use the comment tag to store my own tags (e.g. “meditative, relaxing, flute, dreamy, ambient”)

I really love the way my music is organized now.
I can’t wait for filesystem which will native tagging support (maybe future version of ubuntu?)