Katharine Esty: Unexpected happiness as we age

As families spend time together over the holidays, who is the happiest person in the room? Grandma, grandad? Growing old gets a bad rap but studies have shown that as people age, they enjoy some of their best days. There is no need to dread your next big birthday, says Katharine Esty, a psychologist and author of Eightysomethings: A Practical Guide to Letting Go, Aging Well, and Finding Unexpected Happiness. Dr. Esty, at 87, only recently closed her psychotherapy practice, but her life rema...