I taught myself to take 15 min power naps - best thing I ever did. Not only do I get to doze off, an internal alarm wakes me and I feel like I got 8 hours. I'm totally refreshed and ready to move. I do this on long car trips a lot when I'm drowsy. Pull over, knock out for 15, and get back on my way. They're so amazing. It blows my mind every time I wake up and feel as refreshed as I do.