8 No-Brainer Tricks to Save Around 100 Calories in a Day

Take a Half-Empty Approach to Your Breakfast

When you stumble bleary-eyed into the kitchen in the morning, you're probably more concerned with making sure your cereal simply makes it into the bowl (and not onto the floor) than you are with portion size. But by cutting back on just 1/3 cup of cereal, you can trim 100 calories from your breakfast, says Keri Glassman, RD, CDN, author of Slim Calm Sexy Diet. A typical cereal bowl holds around 2 cups, so try not to fill yours to the brim. (If you're feeling alert, use a measuring cup to see that you're getting the recommended serving size of a cup to a cup and a half.)