The smart playlist feature is often overlooked by the casual iTunes user. 43 Folders has a few playlist tricks that make building “music only” playlists a snap. I find the star rating feature to be invaluable. Shuffle mode is great, but any library is likely to have a certain amount of cruft. By rating enjoyable songs, smart playlists can shuffle using only the good stuff. Remember, one can change ratings on their iPod and it will be synced in iTunes.