Splurge once a week. That's right, order that pizza and eat that ice cream at least one time a week. Why? For two reasons: first, your body's metabolism will kick into high gear when it realizes that there will be fluctuations in what you're eating; and secondly, you'll discover that it doesn't taste as good to you as it once did, and you can't eat as much as you used to. You'll see how far you've come.