Foods to help lose weight

"I eat whatever I want in reasonable portions, " says Frankel, whose favorite snacks include navel oranges, baked chips, and pureed vegetable soups. "Some days it's a cookie. No one ever got fat off of one cookie." For those extra-busy days Frankel relies on Skinnygirl Daily On-the-Go Dark Chocolate Multi-Grain Pretzel Bars. They're kosher and vegan while satisfying your sweet tooth. Plus, a pack of two will only set you back 200 calories (also available in banana oatmeal dark chocolate; $9.99 a box at skinnygirldaily.com).

Kotsopoulos recommends keeping an apple or some grape tomatoes with you when you're on the go. Dried apricots and apple rings are also purse-friendly and healthier than dried cranberries because they have less sugar. For bar lovers, she recommends Vega Sport Protein Bar in chocolate coconut — it's plant-based, soy free, and contains a hemp protein ($2.99, Whole Foods nationwide).