Can't Sleep

It's just too crazy that I'll fall asleep at a decent hour - like 10:30 or 11 and I'll wake up at around 3 - 3:30 or at around 5 - 5:30 for no reason whatsoever! Not being able to sleep kinda sucks, but what can you do? I hate not being able to sleep and then crashing hard when there's stuff I want to do...like watch television. Oh well.