This right here is why I schedule myself for about 8 hours, but also have my alarm set with a snooze feature of 30 minutes. If I wake up but I don't feel done,

This right here is why I schedule myself for about 8 hours, but also have my alarm set with a snooze feature of 30 minutes. If I wake up but I don't feel done, I'll allow myself to snooze a few times before actually getting up. It's simple, but surprisingly effective. I figure, all the studies in the world are nice, but listening to the signals my body gives me is probably the best approach. 30 minutes is about the length of one more REM cycle, and I tend to find that I dream most vividly during those snooze sessions, and wake up remarkably refreshed by the end of them.