According to Woman's World Magazine, the hottest diet gimmick out these these days is something you keep in the cupboard -- Portion-control plates which give you a visual guide to how much you should be eating of each food group. Here are some their picks:

• Portion Pals -- $18
• The Diet Plate and Bowl -- $64
• EZ Weight Plate -- $20
• Portion Doctor -- $10

Sounds like these companies are making money off a very simple concept. But if you want to save your cash, remember this rule of thumb -- Half of your plate should be fruits and veggies, a quarter should be protein, a quarter should be whole grains and if you didn't use fat in cooking, have a little dressing or sauce on the side.