Hey Fuse,
You didn't really give a lot of info. Do you have a lot of muscle already? How often do you work out? What sort of workout routines are you doing (i.e., strength training, or cardio)? What is your diet like right now?
I'd say that the "short" answer is to work harder at the gym. If you're not already, try cross-training and high-intensity workouts. Couple that with a basic, yet delicious, diet of tons of veggies, some meats and grains, and occasional fruits and nuts. There's no perfect answer here, so you'll have to do some trial and error. Good luck.