It is important for you to wait to do any cardio workout until after you have lifted weights if you are trying to build muscle. Cardio workouts are important for burning calories but they can cause you to push less when you are lifting weights. Lifting weights before doing cardio will help you to be able to truly burn out your muscles.
Have a glass of milk an hour before you work out. The proteins contained in milk will help you build more muscle than you normally would during your work out. You should have another glass after you are done exercising to allow your muscles to heal and expand more efficiently.