Well, suggestions that these posts are crap notwithstanding, I’ll tell you what I have done in the past when stuck in a deep rut on bench. Take a week or two off from really heavy bench, then start with incline benchpresses and weighted dips. Set definite goals of increasing both lifts. Shoot for a 20% gain in incline bench and something similar in weighted dips. These two exercises will hit all the same muscles as benchpress, and then some. After you have made gains in incline and dips, go back to bench. You may find that after a week or two of benching, you will be able to set a significant PR.