If you are thinking of backing up your iTunes, Apple support site has a couple of good tips. The first tip shows you how to create a big play list with every song in it and burn to CD or DVD. The article also discusses way to back up just the music you purchased from the iTunes music store. The second tip shows you how to make incremental back up. Essentially, you create a play list with songs added after a certain date.
Tags: OS X, OSX, iTunes, backup, music