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It's all about the light.
Photographers may know all about the right lighting balance, etc, but when I need to get a decent photograph of my art I just set it out on the porch in the shade and make sure the edges are squared. But the small stuff I just scan. The large stuff I scan also, in sections, but it usually takes me a while to splice it all together, so I also photograph those for a quick post.
Fyi, my scanner is an Epson V700. It's lasted longer than any other scanner I've had, and does a pretty good job. It came with the Silverfast SE scanning software which I really like.