I've always wondered if this was mostly a psychological issue. There are two circumstances in which I get less than 7 hours of sleep a night: if I'm really str

I've always wondered if this was mostly a psychological issue. There are two circumstances in which I get less than 7 hours of sleep a night: if I'm really stressed about getting something done, or if I'm really excited about getting something done. In the first place the lack of sleep exacerbates the stress and really starts to weigh on me. But in the second case it doesn't seem to have much negative effect. Now if only I could continuously keep my motivation up...