Many experts recommend regular use of progressive muscle relaxation as a way to help reduce stress.
Lie comfortably on the bed or floor, palms facing upwards. Close your eyes and visualize a point of light that moves to make three clockwise spirals around the body. It will begin at the top of the head, move down to the face and neck, then the upper chest, abdomen, waist, thighs, legs and feet. As the three spirals surround each part, consciously let go of any tension in that area and completely relax. A variation of this exercise is to imagine the light entering your head, gradually filling your whole body with warm healing light.