Steak and Broccoli

Too tired to hit the gym? This meal can help you out. Beef is rich in protein and iron, which your body uses to build red blood cells. They take oxygen to your organs, so falling short in those can zap your energy. Broccoli is the perfect side, because its vitamin C helps your body take in iron. A half-cup of this veggie has 65% of all the vitamin C you need in a day.