In the early days of Google, employee #107, Chade-Meng Tan, observed that while he and his colleagues had no problem “turning it on,” they struggled mightily to “turn it off.” Taking short breaks, let alone disconnecting from work in the evenings and on weekends, was impossible. Even if early Googlers wanted to rest, the pace and thrill of their work made it hard to do. Google was growing fast, but Tan had the wisdom to realize that this style of work—stress without rest—was unsustainable.