Linda Rottenberg has spent her career helping innovators think big. "If people aren't calling you crazy, you aren't thinking big enough," she says. These days taking chances isn't just for young college dropouts in hoodies. Whether you work at a Fortune 500 company, a non-profit, or a mom-and pop store, everybody needs to think and act like a changemaker. We all need to be nimble, adaptive, daring, and maybe even a little crazy, or risk being left behind.