I thought I had it beat, but the last week I have not slept more than a couple hours a day, and almost none at night. Like a good scientist I did an experiment this week end, letting caffeine be the independent variable, and sleep the dependent. I found no effect. After no caffeine for over 24 hours I am wide awake still. I think the cause is probably stress. It would really be nice to actually be able to do an experiment but there's no way to go stressless, unless there's better drugs than I have ever heard of. :P