Relaxation means releasing all concern and tension and letting the natural order of life flow through one's being.
Learn to relax. Your body is precious, as it houses your mind and spirit. Inner peace begins with a relaxed body.
Don't underestimate the value of Doing Nothing, of just going along, listening to all the things you can't hear, and not bothering.
Rest when you're weary. Refresh and renew yourself, your body, your mind, your spirit. Then get back to work.