Annie McKee, a senior fellow at the University of Pennsylvania and author of the book “How to Be Happy at Work,” tells the story of her journey to happiness—starting with her early job as a caregiver for an elderly couple. Even in later, higher-paying work, McKee saw that pursuing prestige and success for the wrong reasons ruined people’s personal and professional lives. She discusses how misplaced ambition, obsession with money, and fatalism are traps anyone, in any kind of job, can fall for—and how to not let that happen to you.