"There were certainly multiple factors contributing to these men's post-moonwalk slump, but the question What do you do after walking on the moon? became a gigantic speed bump. The trouble with moonwalkers and billionaires is when they arrive at the top, their momentum often stops. If they don't manage to find something to parlay, they turn into the kid on the jungle gym who just hangs from the ring. Not coincidentally, this is the same reason that only one-third of Americans are happy at their jobs. When there's no forward momentum in our careers, we get depressed, too. As Newton pointed out, an object at rest tends to stay at rest. So how does one avoid billionaire's depression? Or regular person's stuck-in-a-dead-end-job, lack-of-momentum-fueled depression? Harvard Business School professor Teresa Amabile took on the question in the mid-2000s in a research study of white-collar employees. She tasked 238 pencil pushers in various industries to keep daily work diaries. The workers answered open-ended questions about how they felt, what events in their days stood out. Amabile and her fellow researchers then dissected the 12,000 resulting entries, searching for patterns in what affects people's "inner" work lives the most dramatically. The answer, it turned out, is simply progress. A sense of forward motion. Regardless how small. And that's the interesting part. Amabile found that minor victories at work were nearly as psychologically powerful as major breakthroughs. To motivate stuck employees, as Amabile and her colleague Steven J. Kramer suggest in their book, The Progress Principle, businesses need to help their workers experience lots of tiny wins. (And as we learned from the bored BYU students in chapter 1, breaking up big challenges into tiny ones also speeds up progress.) This is helpful to know when motivating employees. But it also hints at what billionaires and astronauts can do to stave off the depression that follows the high of getting to the top. To get out of the funk, say Joan DiFuria and Stephen Goldbart, cofounders of the Money, Meaning & Choices Institute, depressed successes simply have to start the Olympic rings over. Some use their money to create new businesses. Others parlay sideways and get into philanthropy. And others simply pick up hobbies that take time to master. Even if the subsequent endeavors are smaller than their previous ones, the depression dissipates as they make progress."