Mp3tag helps you add missing tags and album art back.
You say you've ripped, burned, and shared music for years? Chances are, the audio files on your hard drive are a metadata disaster. Quickly clean things up with Mp3Tag, a universal tag editor that supports virtually every audio file type you're likely to own.
Note: This program is donationware. It is free to try, but the author accepts and encourages donations towards further development.