Divide your meals. Instead of eating two or three meals a day, try splitting them up into 5-6 smaller meals. This will help increase your calorie intake and prevent you from overeating at one meal. Then, choose foods that are higher in calories and rich in nutrients. Avoid empty calories because the calories you consume should be rich in nutrients to keep your body healthy and strong, but not empty calories that provide no nutritional value. Finally, try to include healthy foods and foods that you enjoy in your diet. This increases the likelihood that you will still eat what you bought.