At a recent business dinner, I was seated next to a woman who had founded a venture-backed startup. Her company was about four years old, and had raised tens of millions of dollars. I’m an editor-at-large for Inc and Inc.com. At Inc, we write about entrepreneurs, and about burnout. So I asked her, “We always hear that being an entrepreneur is a 24/7 endeavor. But you’ve been doing this for years, and no one can work all the time without burning out. What do you do to stay sane?” “I don’t know,” she said. “It’s funny. You just find a way to keep going.” At some point, I thought, everyone needs...