Stop doing benches and/or dumbell benches and try this routine out:
Smith Inclines:
5 x 12,10,8,5,12 (add wt. each set,then drop weight on last set and go for the burn)
Low Incline Flyes:
4 x 12,10,8,15 (add wt. each set,then drop weight on last set and go for the burn)
Dumbell Pullovers:
3 x 15-20 (constant weight,30 seconds rest between sets)
Dips:1 x failure (bodyweight......try to add reps weekly)
Train fast with very little rest.....rest longer on the heavier sets.