To trigger this relaxation response, lie down on your back, and slightly elevate your legs with a pillow under the knees (or come into whatever is the most comfortable position for you to rest in). Close your eyes and take a few deep breaths, allowing your belly to rise and fall. If you feel any tension in your body, you can intentionally squeeze or contract that muscle, then let go of the effort.
For example, if you notice tension in your hands and fingers, squeeze your hands into fists, then relax them into open hands. If you notice tension in your forehead or jaw, scrunch up your eyes and face, then stretch your mouth wide open before relaxing the face completely. Stay here for five to ten minutes, enjoying the fact that there is nothing to do but breathe. If you’re worried about falling asleep, set an alarm. Make this a daily practice, especially when you’re dealing with high levels of stress or willpower demands. Relaxation will help your body recover from the physiological effects of chronic stress or heroic self-control.
— The Willpower Instinct (Kelly McGonigal), Loc. 800–7