In this 60-second solutions video you will learn how to cut 100 calories form your diet. If you are able to cut calories 3 times a day, you will be cutting more than 2,000 calories every week. Here are some tips to cut 300 calories a day: Flavor your coffee with cinnamon and nutmeg instead of sugar. When you snack on nuts, have one less handful. At dinnertime, leave 3 to 4 bites of your entree.