Try powering up on caffeine and then immediately taking a nap. The caffeine takes a few minutes to kick in, and when you wake you'll feel the combined effect o

Try powering up on caffeine and then immediately taking a nap. The caffeine takes a few minutes to kick in, and when you wake you'll feel the combined effect of a short nap and the caffeine. I recall reading about a study which showed that this method is quite effective, but I don't have a link handy.