Create a motivational mantra. I am what I eat. Bigger isn't better. I'm in it to win it. Rome wasn't built in a day. Think of a saying that reflects your weight-loss journey and stick to it. When you wake up in the morning, state your mantra aloud. When you're feeling weak, recite your saying over and over. Let these words be inspirational enough to steer you away from unhealthy behaviors. It's important to remember that you didn't gain the weight overnight, nor can you lose it overnight. Slow and steady diet changes ensure weight loss that will stay off in the long-term. Don't beat yourself up when you fall off the diet wagon. Make your mantra that day - and in the coming days, if need be - one of forgiveness and optimism that you'll try harder next time temptation presents itself. Forget about slips.
Tomorrow is another day. Make your non-food reward into your mantra for the next time you reach a goal: "Only 3 more pounds until that manicure/pedicure/new CD!" - or whatever you choose as your reward. If you reach a dieting plateau, then start examining your habits more closely. Maybe you'll find you've been backsliding or simply need to increase your efforts. The scale will get unstuck - it's just a matter of staying positive and keeping your eye on the prize.