Time's The Brief

Whether you want to run a marathon, eat more healthfully or just get off the couch a little more, “for the majority of people, setting a goal is one of the most useful behavior change mechanisms for enhancing performance,” says Frank Smoll, professor of psychology at the University of Washington. “It’s highly individual,” he says—there’s no one way to achieve a goal. But these goal-setting strategies will help you stay the course.