1) Day Dream

The day dream is more of a mental check out than a nap, but it still counts. Sometimes, smack in the middle of lecture or work or life you just zone out – lost in your imagination. Opens eyes don’t have to mean you’re conscious.

2) Power Nap

This is an advanced nap that only people with great sleepiness and discipline can achieve. It requires you to fall asleep fast and to wake up 10 – 30 minutes later to be efficient and successful. Coffee makes a nice a pair with this one -- the caffeine will kick in right around when it's time to rise and conquer.

3) Siesta

The typical mid-afternoon nap. An hour is ideal for maximum refreshment.

4) “Ooops, I did it again”

Failed power naps or siestas that run over 2 hours. You wake up, aggravated at yourself for wasting time and somehow even more groggy than you started.

5) Time Travel Hibernation

What time is it? What day of the week is it? Did I miss something important? When did I even lie down? – These are the naps that will just mess you up completely. Something wore you out so much you went full grizzly bear and napped for about 4 or 5 hours into some unruly hour of the evening or night and now your entire sleep schedule is discombobulated. Avoid time travel hibernation with regular 8 hours of sleep or practiced power naps.