I go to sleep with the problem, and wake up with the answer.

A nap clears the head wonderfully, besides giving fresh energy. I realize that about half the people of the world cannot nap without feeling logy afterward, but for those who can, a nap is a time-saver, not a time-waster. In my twenties, I had to do my own writing in the evenings, as my days were taken up with jobs or hack work. I got into the habit of napping around six, or of being able to if I wished, and of bathing and changing my clothes. This gave me an illusion of two days in one and made me as fresh for the evening, under the circumstances, as I could possibly be. Problems in writing can come unknotted in a miraculous way after a nap. I go to sleep with the problem, and wake up with the answer.

PATRICIA HIGHSMITH