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Picture your team as a human body, with you as the brain. Your team, according to D'Alessandro, acts as your vital organs. So when choosing transplants, make sure you don't pick a heart for a liver, or choose an outsider lung the body will reject. The hiring-and-firing stakes are greater the higher up you are in the stratosphere, but if you've made a bad choice, don't be afraid to admit it. The longer you allow an organ to malfunction, the worse it is for the whole body.