It may sound incredible, but your solar plexus -- a complex network of nerves in the abdomen -- plays a key role in calibrating your physical, mental, and even spiritual well-being. In this guide, author Elizabeth Towne outlines a series of exercises and techniques to help optimize the function of these nerves. Once you have gained control of your solar plexus, Towne contends that you will be able to bring more serenity and tranquility into your life.