Editor’s Note: One Small Thing is a new series to help you take a simple step toward a healthy, impactful goal. Try this one thing, and you’ll be heading in the right direction. CNN  —  Useful life advice can be found in unexpected places. And like most wisdom, it has a way of sticking around. In the pilot episode of the 1990s quirky cult TV show “Twin Peaks,” the lead character, FBI special agent Dale Cooper (played by Kyle MacLachlan), walks into a diner with the local sheriff and orders two