A lot of people start moonlighting to make ends meet. But at a certain point, the opposite happens: diminishing returns can mean you need to scale back or get rid of it altogether. Here's how to tell whether you've crossed that line. You're Always Tired It's one thing to stop sleeping in and quite another to get less than seven or eight hours of shut-eye a night because you're working long hours. The latter will eventually interfere with your productivity and, worse than that, your health. Read more [...]