I can't get a sleep pattern either. I try but sometimes I cannot get myself to go to sleep or even relax enough to sit still for a few minutes. I do not believe a 24 hr day is long enough. I never slept through classes or was late for work when I'd be up so late, well without choosing it, instead I give sleep and deal with it. Sometimes I luck out and have a few days of feeling really good and productive ... Oh wait apparently that's bad and has this scary name, "hypomania". Usually though nothing interesting happens when I'm sleep deprived and life goes on.

Lack of sleep is so much easier to deal with when you don't care so, next time you stay up late, get up on time!