how do you guys sleep? that may sound weird but I do not know how to fall asleep unless I'm really really tired. at school, I fall asleep in EVERY class whenever the teacher starts lecturing. also, I can fall asleep easily when the environment is not right: for example, I'm tired of doing hw so I lay down for a bit...then I fall asleep despite the radio and lights are on. but when it's time for me to actually sleep (lights off, me comfortably in my bed, etc), I cannot sleep at all. so what do you guys do to sleep?