Savasana is, in a sense, a lying down meditation and great for clearing the mind. The body holds stress in the form of muscle contraction and Savasana is the ultimate opportunity to release this tension.
Savasana also allows you to accept yourself and to be at peace with the world. There is no striving or struggle in Savasana; when you surrender to the present moment, you can fully accept who you are and take a break from worrying about the past or planning the future.
When in Savasana, allow your body to fully melt into the floor and your joints to feel heavy. Lengthen your breathing and allow your exhales to become slightly longer than your inhales.
To come out of Savasana, deepen your breath and open your eyes. Wiggle your fingers and toes, then slowly sit up, rolling over to one side and coming to a seated position.