By Alanna Nunez for Shape.comChris Powell knows motivation. After all, as the trainer on "Extreme Makeover: Weight Loss Edition" and the DVD "Extreme Makeover: Weight Loss Edition-The Workout," it's his job to motivate each contestant to stick to a healthy eating and workout regime. Since even we sometimes have trouble getting out of bed in the morning to work out (yes, it's true!), who better to ask than Powell about how to keep yourself motivated to work out and lead a healthy lifestyle?