So yeah, being able to quit and leave whenever I want and take 2-3 months of break does take off a lot of weight from one's shoulders. 40 hours a week with no overtime or on-call for me! I will not be the employee with the mad bonuses when the time comes for that, but I will also be the one not on medication/suicide watch/psychiatric aid. The company will have a stable workforce that is able to care an adequate amount for the company's well-being, and I will not spend my bonus on keeping my health intact. If you don't want to employ such a person, I don't want to work for you either. Easy as that. :^)
So yeah, the essence of my comment, I would say, is that make sure you have financial get-away. You don't have to subscribe to the crazy USA way of overtime>money>health issues>expenses>overtime to compensate for expenses. Having a small vegetable garden also helps, or just caring for plants on your windowsill.
Also, cats.