My Fifth Challenge is to be more Active. But not just that alone! : ) I challenge you to do some sort of workout. Whether it is at a gym or just going for a walk...any type of exercise like that will work. The step I would add to that is while you are working out(even going for a walk counts) LISTEN to a talk by a General Authority. My favorite is to listen to Elder Holland's talk when I work out! It really helps me work out harder and longer than I necessarily want to, which is really awesome but the best consequence is that when you are done, you just want to be a better person! You feel spiritually rejuvenated as well as physically.
My specific challenge is for one week, every day, exercise and listen to a talk by Elder Holland and pay attention to how you feel and how it changes your workout and your day!