An amazing new weight-loss plan is taking the world by storm. Known as the 5-2 or Fast diet, it calls for counting calories only two days a week and eating normally the other five. The regime helps you stay on track and lets you conveniently adjust your weight-loss plan to accommodate splurges, holidays, and other diet busters. And best of all, studies have shown you can actually shed more pounds dieting only two days instead of depriving yourself all week. The strategy calls for cutting back calories to 500 (600 for guys) on two nonconsecutive days each week. Which is a simple matter with...