Close grip incline barbell presses work really well too...squeeze really hard at the top.
My brother and I devised this shock routine for chest where we'd take and adjustable incline bench, start at the highest position (almost 90 degrees) and start super-setting incline db presses with incline flyes. Do one superset, then lower the angle, and repeat until the bench lies flat. (we'd go through about 5 positions like this - for a total of 5 supersets)
I thought my chest was going to explode, the pump was unreal, and so was the pain afterwards.
Oh, and keeping your chin down while your doing the incline press seems to help as well...