When was the last time you did your workout differently? Not a different workout. The same workout done, y'know DIFFERENTLY? One of the biggest pitfalls anyone call fall into is simply doing the same routines day in and day out without any real change is style or substance.
Training is about making yourself stronger in a fatigued state. Not hitting a certain weight or rep range. Your goal in the above pendulum swing is to be just as strong on your Bench Press whether it's the beginning or the ending lift. Anyone can hit their target number week after week if they are always setting up the environment the same way. You job is to continually challenge yourself to perform up to your maximum level no matter what the conditions.