I'm slowly becoming a convert to the principle that you can't motivate people to do things, you can only demotivate them. The primary job of the manager is not to empower but to remove obstacles.
In Japan, employees occasionally work themselves to death. It's called Karoshi. I don't want that to happen to anybody in my department. The trick is to take a break as soon as you see a bright light and hear dead relatives beckon.
Scott Raymond Adams (1957 -)
Source: Dilbert's manager from The Dilbert Principle, 1996