Chin-Ups for the person who can't do one. This site contains a plethora of information on improving your Chin-Ups, even if you can't do any. The key to getting started is to use favorable cheats to strengthen the required muscles. One word of caution, Stew Smith warns against over working the muscle groups. Bret Contreras fills in any missing pieces with this in depth article. Pulling Exercises for Climbers can help as well.
What happens when you plateau on the Bench Press? This article in BodyBuilder.com called Bench Press Blast Off covers the 15 steps needed to push past the plateau. Here is some research on the number of sets and reps you should incorporate into your workout. The Poliquin Group gives their 10 Tips for the Bench as well.