About 17% of Americans are flourishers, says a study in American Psychologist. They have a positive outlook on life, a sense of purpose and community, and are healthier than "languishers"—about 10% of adults who don't feel good about them selves. Most of us fall somewhere in between. "We should strive to flourish, to find meaning in our lives," says Corey Keyes, PhD, a professor of sociology at Emory University. "In Sardinia and Okinawa, where people live the longest, hard work is important, but not more so than spending time with family, nurturing spirituality, and doing for others."