A few tidbits I incorporated:
1-I stopped trying to move as much weight as I could. I know this will fly against what most people suggest, and to be honest, if you are more of a beginner, ignore this one and focus on improving your strength base a bit first. While I'm no powerlifter, I do fancy myself a bit of a strong fellow. However, putting up 4 plates per side for a few reps and looking like crap vs staying under 3 plates per side and looking impressive (in hindsight of course) is no contest in my mind.
2-I learned to keep my shoulder blades pinched together slightly, and keep my shoulders pulled back in order to keep the stress of presses more on my actual pectoral muscles.
3-I eliminated the lockout portions of most movements, instead focusing on actually applying the most stress to the muscles through the greatest range of motion without any actual rest periods within each set.
4-Reading up on Compensatory Acceleration Training, I understood the rationale for acceleration during the concentric portion of movements, and focused on this approach during each training session.
5-I made use of pre-exhaust work when it came to the order of my exercise selection. Essentially making the weights I would move lower, but the work my target muscles would receive greater.
6-Finally accepting that flye movements never gave me the magic results some people were holding their breaths for, I switched completely to cable work, which gave me much better continuous tension, as well as the ability to incorporate angled benches and really target specifically angled contractions.