Guided imagery can help overcome stress, anger, pain, depression, insomnia and other problems often associated with illness and medical/surgical procedures.  Guided imagery has also been found to decrease side effects and complications of medical procedures, reduce recovery time, shorten hospital stays, increase self-confidence and self-control, strengthen the immune system and enhance the ability to heal. It can help you tap inner strengths to find hope, courage and other qualities that can help you cope with a variety of conditions.  (The Cleveland Clinic)