Most of us spend our careers trying to avoid making mistakes -- and failing that, trying to hide them. The problem with this way of doing business, of course, is that it makes it hard to fix errors, and even harder to learn from them.
Some bad jobs are in the eye of the beholder – for whatever reason, the gig is the opposite of what you hoped you'd be doing at this particular place and time. Other bad jobs are more clearly defined: the pay is barely enough to live on, the duties don't use your skills, education or talents, or the people are just plain mean and unsupportive. Whatever the reason for your discontent, there's some good news hidden in even the worst work experience – bad jobs have a lot to teach you about building your best career, if you know how to look.