Lie flat, face down, on an inclined lat bench (or any bench). Use two dumb bells. Really, you're just doing a chest fly, but you're doing it while lying face down, on your sternum, so the rhomboid muscles that support your shoulder blades from spine to shoulder blade are doing the lift to pull the dumb bells back to the fully extended position parallel to your chest. It's the exact same motion as a chest fly, but because you are face down, the stress points are reversed. The dumb bells are at rest when they meet in front of your sternum, and when you pull them away so that they are parallel with your pectorals, you are at the point of greatest stress. Instead of the inner pecs, you are using the rhomboid muscles in back.

I am posting this to the entire list because *all* weight lifters, casual or otherwise, will do their backs and necks a favor to offset chest exercise with rhomboid exercises. Strengthening the chest muscles tightens them and pulls them in, drawing down the shoulders and ruining natural posture. The rhomboid rows will offset that pulling by creating a tightening rhomboid pull from the back.