I need some input on the most effective chest excercising for putting on mass. I got incline dumbell press, decline barbell, flat and decline flyes and cable crossover on my chest day. I will be changing it in a few weeks, any suggestions?

http://www.postwhore.com

Try doing some pushups with your feet elevated. Also, heavy bench pressing is your best bet. Mix up with some low reps (heavy weight) then some high reps (light weight).

Incline/decline/flat bench. Try doing pushups with barbells so you get down deeper and keep it somewhat wide. You'll feel the burn. Don't forget chest flies with free weights.