One way to avoid gaining weight is to make healthy choices when you're at the supermarket. Janis Jibrin, a registered dietician and author of Good Housekeeping's The Supermarket Diet, offers these great tips.
Don't be swayed by the word light on food labels (it may be describing fat content, taste, or color). Instead, compare the original product to the "light" version and look for a reduction in calories or fat.
When shopping for whole-grain foods, make sure you get the real thing. Check the product's label for the words whole wheat, whole rye, oats, or other whole grains.
Focus on fiber when you buy cereal. You want to get at least 4 grams of fiber per 100 calories. Rely on the labels: Some brands carry both high-fiber and low-fiber cereals.
Buy whole fruits rather than fruit juices. You'll feel fuller on fewer calories and get more fiber from the actual fruit. A cup of apple juice, for example, has no fiber and more than 100 calories, but a cup of sliced apple has 74 calories and more than 3 grams of fiber.