Learn techniques for building each group of muscles. Many people who work out make the mistake of emphasizing speed over technique. Performing an exercise with care and deliberation, will give you far better results than quickly churning out sets in bad form. Go slow, and ensure that you are doing exercises in the correct manner. Always take in enough vegetables. Unfortunately, too many diets that focus on building muscles all but ignore vegetables. Vegetables give you important nutrients which aren't in foods that usually have a lot of protein or carbs. An added plus is that vegetables are also high in fiber.