I would have shot the first piece from a little higher angle and off center, show the top. The third piece is just a mess with that art glass in there. Just my opinion, but the glass ruins the whole thing for me. Nothing you can do with a camera will help it, except maybe shoot it with the doors open. I also would have shot it from a higher angle.
It might help your learning process to study some furniture shots out of a catalog or even the Sunday suppliments. See how they do it. That's what I'd do. You know those guys are already good enough to make money at it. 