lol, i have no problem sleeping, i have problems staying awake
umm try having a bath or a shower before you go to bed
do meditation for 10 minutes, that usually works.
try not to go to sleep within 30 minutes of studying because your brain will still be active and it'll be hard to go to sleep with your brain buzzing with facts.
ooh and mozart is very helpful! none of the fast stuff, just calm pretty stuff. try counting the beat of the music along with a clock and if its slower than the clock, that's the stuff you should be listening to (music with 60 beats per minute is apparently the most effective for studying)