I have power "lounges" on long drives. I can tell I'm not going to make it to wherever I'm going so I find a safe and quiet spot and just lay back. I don't usually fall asleep but 10-15 mins later I'm feeling surprisingly refreshed.
Still on the car thing, Australia runs radio, TV and newspaper ads plus places signs on major highways to encourage people to pull over and have a power nap.
I must try it at home, problem is that I can take a while to get to sleep. I wonder if I could rig something so that it counts 15 mins from when I stop pressing a button.
