01/20/2012 11:35 am ET

The Worst Career Blunder You Can Make

Throughout my years of working, I've made a large number of mistakes in my professional life and career planning - 52 critical mistakes, in fact. Even as I reinvented myself several times (from unhappy corporate VP, to marriage and family therapist, to fulfilled career coach and executive trainer), I took serious missteps, including waiting too long to move away from a direction that wasn't working, or partnering with the wrong folks who, in the end, made me miserable.

Of all the career mistakes I've made, and of those critical career errors I've observed in hundreds of professionals over the past eight years, there's one blunder that stands out as the most damaging and demoralizing.

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