Sometimes we need to take a nap to refresh ourselves.
While taking a nap we should let go all the thinking and emotions.
We do not need to bring them into our short slumber.
We just need to relax completely without any distraction nor attachment.
Nap is very nice when we let go the whole world and sleep comfortably.

After lying down,
clench your fist tightly
and tense up the muscles of your whole body for a few seconds.
After that, let go all the forces and tension and stay relaxed.
You will notice that the letting go of the tension of your body muscles actually feels very good.
Now you can have a relaxing slumber
without attachment to anything.