Tell yourself that just for now you will leave behind your expectations and preconceived notions. Consider the possibility that, no matter how bleak your situation seems, the end result will be a good one. Look at your priorities and learn to let go. Ask yourself if being right or controlling every situation is more important than improving your health. Focus your attention on what you are experiencing moment to moment.
Many programs teach various ways to experience inner peace and tranquillity, thus relieving stress.
The common threads of these tools are repetition and a passive disregard of everyday thoughts. You can take some classes or rent videos to find the practice that takes you to the quiet place where healing can occur, and then do it every day. Breathing, especially diaphragmatic or abdominal breathing. Visualization or guided imagery. Progressive muscle relaxation.