Being a “happiness guru” is hard work. My years as a labor lawyer battling Teamsters were easy in comparison. So was fighting my way up the corporate ladder at Coca-Cola Enterprises. But since I started working with Martin Seligman of the University of Pennsylvania, the world-famous expert on the science of well-being, things have gotten really tough. All people want from me now is the secret to happiness.

My lawyer friends sometimes ridicule me about my new vocation. (“Hey, are we playing golf today or searching for truth and meaning?”) But they also want to learn about well-being. So do a growing number of law schools, law firms and legal departments.