I've got that "Cheerleader" song stuck in my head, and it's true: on the quest to lose weight and get fit, you're your own best cheerleader. Because if you don't believe in yourself, you won't have the motivation to keep going. For those times when the journey just seems so frickin' impossible and you're starting to lose faith that you can do it, whether you're on the treadmill or looking at yourself in the mirror, keep these phrases on hand to encourage yourself to keep at it.