I personally like the art photos that have walls or backgrounds cropped out (as in just showing the actual art) I have noticed when it comes to editing if I crop it first, then enhance it, it generally worked better. Also, what kind of camara and/or settings are you using? If you can not borrow a better camara from someone, try the different settings on your camara to see what kind of different effects you get. Also, when I take photos of my items, I take 5-10 of each one, and pick the clearest one when I can see them larger on my computer. I just re-did all of my photos today, so I know what you are going through, it's quite the process!