When you have good posture, your body moves more easily and with more energy. To help, try this trick from New York City trainer Joel Harper (www.JoelHarperFitness.com). Always keep your gaze straight ahead. Our bodies tend to go where we look—look down and we stoop, but keep your gaze level and your posture immediately improves. As you’ll see when you try it, you can’t have bad posture if you keep your eyes at eye level.