You need to get calories from nutritious foods!
Add small meals or large snacks in-between breakfast, lunch and dinner. Eat appetizers and desserts, too, when you can. Don't fill up on liquids, especially those with few or no calories. Drink after you've eaten. Drink 100 percent fruit juice, which offers calories and nutritional value, rather than sugary sodas or sports drinks. Replace a serving or two of whole fruit with fruit juice, as it contains many more calories.