We all know that managing diet is a critical component of living a happy, healthy life. But sometimes we need a little help to set us on the right path. Creating healthy habits that stick is nutritionist and best-selling author Kelly LeVeque's domain of expertise. Her clients include A-listers such as Jessica Alba and Molly Sims. Kelly joins us today to talk about everything from what four foods should be at the center of our diet, how to avoid crashes and cravings, and why calorie counting isn’t always the most helpful to stay on track.