You can practice this at different positions (sitting, standing or lying down).

1. Lie down on your back. Rock your hips back and forth to put your spine into a neutral position. Neither over-arch or over flatten. If you lie flat on your back, it may hurt, so you may place a pillow under your knees for added support.
2. Begin to breathe in and out through your nose, taking deep breaths each time. Breathe deeply from your diaphragm. Focus on your breathing. When other thoughts come into your mind, think “breathe in, breathe out.”
3. At the end of each exhalation, squeeze your gluteal muscles together. With each breath, you should relax more and more and feel the tension release from your body.
4. For added benefit, follow this next step. If you are stressed or anxious, curve your tongue downwards toward your bottom teeth. If you are having cold or sinus trouble, curve your tongue upwards so that it gently touches the upper gumline.
5. Breathe deeply in and out through the nose and relax. Visualize yourself relaxing and becoming at peace.

Breathing is vital, and it is free. All you have to do is pay a little attention to doing it properly.