In the 1993 film Groundhog Day, misanthropic meteorologist Phil Connors relives the same 24 hours, over and over and over again…for years on end. Given nearly infinite “do-overs,” Phil learns to speak French, play jazz piano, and flip cards into an upturned hat. Most important: he discovers the good in other people, and he learns to care about them. In return, they love him back. There's a lesson in Groundhog Day for all of us: Trying to do something over and over again, with intention and focus and feedback on what we could do better next time, is how you improve—at anything.