We spend most of our adult waking hours working. Half of Americans continue to work when they reach their mid-sixties, and, according to a 2015 Gallup survey, full-time American employees work an average of 47 hours a week. If you’re keeping track at home, that’s six days’ worth of hours packed into five. Moreover, many of us today expand the role of work beyond just earning a living and expect our careers to provide opportunities for personal growth and fulfillment.