back when i was lifting for football, sheesh 6 years ago, my coach had a system that i had really good gains on. while doing it i went from starting jv to starting varsity, in one offseason. my bench raised probably 100lbs in a 3 month stretch, give or take a few lbs. it went like this:
first you have to determine your 10 rep max.
sets x reps
day 1 3x10 pick a weight that is slightly above comfort level
day 2 5x5 pick a weight that really challenges you, but not so heavy you can't complete the sets.
day 3 3x3. pick a weight that is close to your 10 rep max. you will feel like you aren't doing much, this is a really quick session.
day 4 1x10, 1x8, 1x6, 1x4. start with your original 3x10 weight, and progress up to your 3x3 weight. take at least a day between days, but you should see gains after a few cycles of this. you should probably add weight every 2 or 3 cycles, or whenever you feel you are ready, but don't push it, day 4 is tough.
i got much stronger doing this plan, but i also bulked up a lot, though i guess at the time i wasn't worried about size, i just needed the power. i.e i didn't do any cardio at all while doing it, and i didn't watch my diet at all. it would probably be good to do some cutting off and on if you do this program.
hope this helps with your problem, if you have any questions, let me know.