Mindful Diaphragmic Breathing
Get into a comfortable position, close your eyes, and start to notice your breath. Before you begin to alter it, pay attention to the pace and depth. Are you taking deep breaths or shallow ones? Are you breathing quickly or slowly? (Becoming aware of your breathing can help you to become more mindful of your body's response to stress, and can help you to notice when you need to deliberately relax your breathing.)
Counting your breaths can be helpful, both for pacing and as a form of meditation. This technique helps with pacing—it enables you to elongate your breath and stretch out your exhales. There are a few ways to do this.
Deep, Cleansing Breath
Sometimes all you need to release stress from your shoulders, back, or the rest of your body is a few big, cleansing breaths. Breathe in deeply through your nose, and take in as much air as you comfortably can. Then release it, and really focus on emptying your lungs. (Many people hold air in their lungs after an exhale, so emptying your lungs on a deep exhale can help you to get more fresh oxygen into them.) Repeat this breathing exercise for a few breaths and release the tension in your back, your shoulders, and anywhere else it tends to reside.