I usually sleep on my side or on my back, in the dark. As for how many hours of sleep I get, that depends if I have to wake up for class/errands/etc. the next day or if I can sleep in. Ideally, I'd get 8 or 9 hours of sleep but if I have to be up for something the next day I usually get anywhere from 4 - 7, depending on whether or not I have trouble sleeping the night before (I have a bad habit of sleeping in and then not being able to sleep the next night, LOL). Also, even when I do sleep in I usually get woken up a few times by noise, etc. or just wake up a few times and go back to sleep. I don't snore, lol.