from my viewpoint what you do is play some peaceful music at a very very low volume just enough so you can barely hear it
I know it sounds stupid but it works
or you could try reading a book
try reading the bible
either you get spiritually elightened and able to go to sleep or it is that you get so bored of it you fall asleep
or try Lord Of The Rings books
fetusdoctor
They make RedBull so you don't have to sleep.