Leave the sugar A portion of the daily caloric deficit comes from dietary change. Instead of eating high-calorie foods that contain lots of sugar, trans and saturated fats, emphasize low-calorie foods. It replaces processed foods like cookies, donuts and sweets for healthy food like fruits, whole grains, vegetables, low-fat dairy products and lean protein. Eat smaller meals to consume fewer calories, and eat a diet that does not feel restrictive so you can be a part of your new healthy lifestyle.