For a quick drop in pounds, a raw food diet will do the trick and help you keep the weight off. The only catch is that living mainly off of uncooked, unprocessed, organic fruits and vegetables might be tough to follow for some. That said, consuming raw foods can cut back on nearly half the calories you would eat if it were a cooked meal. The diet's emphasis lies mostly on food rather than teaching how to create a healthy lifestyle through a balance of exercise and portion control.
Cost: Expect to pay a bit more for organic produce.