The biggest challenge of the pre-coachella days is getting to know all the artists so you can AVOID missing something AWESOME just because you never heard of the band.
Sooo, what I do is spend all my free time finding youtube videos of all the artists.
If your are on facebook, post your videos to the Coachella 2008 group http://ucsd.facebook.com/group.php?gid=8302684070
Also last year's videos are all on my youtube playlist
you can post there too if you prefer