I have discovered a lovely service, MusicBrainz, which will sort through my rather poorly categorized collection of music and tag it with the proper artist, title, album, genre, etc. It does this by “listening” to the song, generating a fingerprint, and then looking that fingerprint up on a website which seemingly aims to be the Wikipedia of Music.
MusicBrainz’ tagging tool is called Picard, and it is available for Linux, Mac, and Windows. I got my copy from my friendly neighborhood Ubuntu repository. If you register on the MusicBrainz site, the tags you edit and save for your music will be uploaded and shared with other MusicBrainz users. Enjoy!