Recommended Reading: The Breathing Book
One of the best books you will find on breath and breathing, The Breathing Book by Donna Farhi not only introduces new concepts and ideas about the power of your breath, it includes exercises, physiology and stretching exercises to help you to open up and access a full-bodied breath.
Exercises and inquiries are available for you as an individual, but also for couples, which is incredibly powerful and moving. Learning to breathe; learning how to modify your breath to moderate your consciousness and help to release negative breathing patterns is one of the best ways to dedicate your time and energy.
Truly, this book can change your life if you do the work. Do the work!