Then you need HIT and a protein loaded diet, regular meals every 4 hours. If thats difficult use a good quality protein shake, ideally an all in one like cyclone which includes your creatine and the mineral compounds you need. Under the HIT system you are doing a set, add weight, no rest, next set until failiure. Aim to use a weight on which you fail at 6 - 8 reps. If working out at home use dumbells not a bar, and dont forget the dumbbell flys which work your chest far harder than press alone.