Tension may be eased by the simple exercise of total relaxation. At least twice a day, the student should stretch out and lie perfectly still. He must endeavour to consciously relax every part of the body. Breathing should be slowed down and kept at an even pace, the intake matching the outflow. The exercise need only take a few minutes--or until all signs of tension are gone.
-- Notebooks Category 3: Relax and Retreat > Chapter 3: Relax Body, Breath, Mind > # 3