A good life. That’s the prize we are all working towards. To look back on life and know you did everything possible to live it to the fullest: happy, healthy and perhaps even wealthy. There’s good news for good living. A recent study unveils the secret that could most positively impact longevity, physical health and keep our minds sharp as we age. Robert Waldinger is a psychologist, Zen Priest and, most relevantly, the fourth Director of the Harvard Study…