It's bodybuilding young grasshopper. There is no wrong way to train as long as it works for you.
I say start with flys, go to cables next, then pec-dec, finish off with high rep partial dips with your chin tucked down to your chest. Never lock anything out. Lots of volume, light to moderate weight. Train your pecs, not your tris or delts. Concentrate.
I expect big things.