Adam Grant, organizational psychologist, Wharton's top-rated professor and bestselling author offers up his surprising research on originality, including the fact that people who are "idea machines" are more likely to procrastinate, more likely to play it safe and just as likely to feel the same fear and doubt that the rest of us do. In Mailbag, we cover how to raise kids who want to be investors, and why you need a cohabitation agreement if you're moving in with the LOYL.

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