Photo: Melinda Josie

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Alia Crum, PhD, professor of psychology, Stanford University
"Any big change causes stress, but that doesn't have to be a bad thing. Your stress response is designed to help you meet the demands you face by increasing your focus. To harness it, first acknowledge that what you're going through is tough. Doing so changes where you experience the stress in your brain, moving it from the reactive amygdala to the more rational prefrontal cortex. Second, tell yourself you welcome the stress. This doesn't mean admitting the stressor is good. But stress occurs only when we care about something—so the third step is to think about how to use what stress tells you to create a life more vital than the one you had before."