Speeding up your metabolism means learning how to dedicate the time and energy to a proper exercise program and it means learning not only correct exercise technique but also the correct level of intensity (degree of difficulty). There are a number of supplements that help build muscle mass. Eating oats helps lower your insulin level and will give you more energy and endurance when doing your day-to-day activities.
This is why it's so critical for you to track your progress. Lift as much weight as you can and get someone to spot for you. When your workout is the same for each session, your muscle growth is eventually going to stop because your muscles are accustomed to what you are doing.