To keep your energy up, improve your mood and rev up your metabolism, eat protein for breakfast, says Mark Hyman, M.D., author of Ultra-Metabolism. “Most people start off in a way that sets them up for disaster. When you eat only carbs, you don’t have the amino acids needed to feel focused, alert and happy. You don’t have the ability to modulate your blood sugar. Appetite increases and you find yourself seeking out more sugar and caffeine.”

Skip the cereal and instead serve up a plate of eggs, whole-grain toast with nut butter, scrambled tofu, or a protein shake. Your body will thank you for it.