The only thing I can think of is dips as well. I have to really concentrate on my form when I'm doing dips, just because of the way my chest is shaped. I'm the kind of guy who much prefers decline bench to dips, but like you, I don't have access to a decline bench
. For some reason my triceps always took most of the weight during dips, even when I'm leaned forward. That's why I usually prefer to save dips for triceps. Bench dips at the end of a triceps workout are great!
In my situation, being without a decline bench, I just focus on other exercises. Namely, bench presses, incline presses, and flyes. Eventually I'm going to switch back to the better gym in my town that actually has a decline bench. Right now I go to a crappy gym that's free. "Free" being the key work. Haha
Good luck with that man, I know how you feel!