First, you lay on the mat on your back, arms at your side, palms up, heels together, toes flopped out. Then you close your eyes and concentrate on your breathing: slow and even. Earthy yoga music helps, but it's definitely optional.
Today during savasana, we imagined the sun slowly rising over our toes, then up our shins, and on to the rest of our bodies. While laying there, you try to release any lingering tension in your body. Even relax your eyebrows and let your tongue fall away from the roof of your mouth.
Lay on the mat until you're ready to get up - yoga is all about being in tune with your body. Enjoy!