Do you nap?
I don't because I don't feel well for the rest of the day, if I nap. And it also takes me so long to relax that by the time I was ready to fall asleep, it'd be time to get up.
Napping is not really an option for me but if it were, I could only nap for a maximum of 15 minutes. If I took even only a 30-45 minute nap, I'd be groggy for the remainder of the day.
Yet I know some people can take a 30 minute 'power nap' and be really energized afterwards.
I wonder why naps work for some, and don't for others?