Pick a target weight. As you begin the 17 Day Diet, it's good to have a goal of how much you want to lose and what your target weight should be. Even if you don't make your ideal weight, remember: Every pound you take off is a pound your hips, knees, and heart do not have to carry around; even a 10-lb. loss is good for your body.
How to figure out your target weight:
If you're a woman, take 100 pounds for the first 5 feet of your height. From here, add 5 pounds for every extra inch. This number represents the midpoint of your weight range. Depending on your frame, you can either add or subtract 15 percent from this number. For men, begin with 5 feet and 110 pounds. For every inch you exceed 5 feet, add 6 pounds. Again, you can add or subtract 15 percent depending on the size of your frame.