My suggestion is listen to them on the diet. Get a gym membership. Get a workout partner that is bigger,stronger,and more dedicated than you in the gym and try to compete with him. Get in your own zone in the gym and don't talk to anybody, just talk to your partner about how many times your lifting. Learn proper techniques for lifts. Bust your ass in the gym so hard that it will make yourself want to go to bed after such a hard workout. Have a good protein/carb meal/shake within 30-45 minutes after the workout. Log your lifts and progressively load weights each week even if its only 5 lbs. And Finally, DON'T EVER THINK YOU KNOW EVERYTHING. ASK ASK ASK ASK AND ASK.