Herbert Benson, M.D., Harvard researcher and author of The Relaxation Response and Timeless Healing, says, "Faith quiets the mind like no other form of belief." Here's the technique: Repeat a simple, neutral word such as "one" for several minutes. For even more profound physiological changes, use a word or phrase with meaning to you, such as "Shalom," "Om," or "Hail Mary, full of grace." Then close your eyes, breathe in through your nose and out through your mouth, as you say your word or phrase silently as you exhale. When stray thoughts come by, gently release them and continue repeating your phrase. Do this deep breathing exercise for 10 to 15 minutes each day.