The first scientifically backed guide to a happy, fulfilling retirement. Over the years, Dr. Fritz Fraunfelder and Dr. Jim Gilbaugh have seen thousands of their patients respond differently to the challenges of retirement: some rose to new heights; others hit new lows. The doctors began to wonder: How do some people maintain their vitality, interests, and zest for life in retirement while others became distant, even depressed? Is there a magic formula...