Agree Mash, however a "target" can be a good motivator. My target 2 years ago was 315 (thats 3 X 45 lbs weights each side, on a 45 lb. bar). I was stuck on a plateau of 285 for the longest time, like 3 years! Hired a personal trainer for 2 months and he busted my butt, almost puked the first couple of times working with him. But he got me over the hump. Once I hit 315 I felt I'd achieved a goal I'd set out to do.
Now I'm just in maintenance mode. I start with 185, then pyramid up to 285, the last set I can only to about 3-4 reps. Then the pecs are completely fatigued, and thats the goal, fatigue them so they tear, then rebuild. Then its onto incline dumbells, decline bench (on a machine). The next week I mix it up, I do max dumbbell bench only, then other pec machines to achieve max muscle fatigue.
I do like to "check my max" every now and then, about once every 3 months, just so that the personal trainer 28 year old female trainer will come over and spot me, while I get a nice shot if you know what I mean.
I'm getting older too, (45 now) so I have to be careful.