Hmm....most of the time, I can't fall asleep listening to music, if I'm really hyper, but the other day, it was 12:00 and I couldn't fall asleep, so I popped in the Lord of the Rings soundtrack, and played "May it Be" over and over again. That really helped. I think anything slow, would be good. Silverchair's "Diorama", I've found, is also a very good cd to fall asleep to.