I have to have a quiet room or at least just rythmic sound(unless im dead tired in which case i could fall asleep almost anywhere). I sleep on my chest with my head facing away from my alarm clock, and a pillow under the left side of my chest (helps me breathe, i have no clue why). then i have to get my foot to sit right because i dropped a big cinderblock on it a couple months ago and now it sorta hurts if i try to sleep on it funny. Then i gotta stop thinking about stuff and eventually fall asleep.