Create a Smart Playlist
To really be a Jedi-level iTunes guru, you must master the art of the Smart Playlist. The most enlightened of all the playlists (don't let Genius Playlists fool you), Smart Playlists can be used to quickly create genre playlists, sort out your least favorite tracks, or keep your kid's insipid music from infecting your iPhone.
To help you on your way toward total playlist domination, I've put together a little video and a slideshow to get the ball rolling. If you've got a favorite Smart Playlist tip to share, please be kind enough to drop it in the comments section.