Always stay up late and drink more yogurt. Low-fat plain yogurt contains protein and fat, which helps to prolong satiety. Most yoghurts contain sugar. It is recommended to choose plain yogurt and add some fresh fruit. Often stay up late and eat more soda cookies. The combination of complex carbohydrates and protein can provide people with the energy they need to stay awake. Choose 100% whole grain soda crackers and low-fat milk, but control the amount, because too much protein will make people hard to digest.