Suddenly, creativity is big. While your chances of making millions as the next Andy Warhol or Taylor Swift are probably slim, you could well earn more these days by tapping into your creative powers—and, experts say, you'll be happier, too. Numerous Fortune 500 companies, including Hewlett-Packard and Sears, have hired creativity consultants to help boost innovation. The number of business schools offering creativity classes has doubled in the past five years. "It's not enough to just be good at analytical evaluation," argues Yoram Wind, a professor of marketing who teaches a creativity course at the University of Pennsylvania's Wharton School. And creative activity can relieve stress and enhance your mood, according to Harvard psychologist Shelley Carson, author of Your Creative Brain. Brain researchers theorize that coming up with something novel that's also useful—their definition of creativity—so fully engages attention that the brain doesn't have any resources left to devote to stress.