Just talked to a friend of mine who told me she naps at the same time every day for an hour. She says she blocks out the time on her calendar and only schedules in something else when she absolutely has to do it. This way she always feels refreshed, can enjoy her evenings without feeling tired, and feels that she is pampering herself. If she can't fall asleep (which seldom happens), she reads in bed and rests. Sounds good to me!