There's a weird dichotomy here between startups and established companies. The hivemind says that the more hours you spend on your startup, the better. If you have 16 waking hours a day, nobody would tell you to spend just 8 of them on your startup. Yet if you work at an established company and your day is longer than, say, 10 hours, you're doing it wrong.<p>Brutal hours produce burnout, and I suppose the idea when doing a startup is to work hours that you know will eventually burn you out badly, but just hope that your company makes the big time before then. But in a bunch of ways, especially if you're going for a lifestyle business, that doesn't seem advisable.