People talk of deep breathing as the key to controlling stress. Deep breathing is not the key. In fact, deep breathing alone may cause hyperventilation which will make you feel even worse. The key is slow breathing. Easy breaths taken deep in your stomach with your diaphragm. Find a relatively quiet spot to sit down and put your feet up. Become aware of your breaths and gently focus on your exhales. Do this for about 15 minutes at a time. If you do this simple exercise just once each day, it can make a difference in your stress perceptions and reactions.