(OK, maybe "Superclient" is a bit strong, but at least a client who makes us creatives super happy and therefore super productive. And that's what you want, isn't it?)
Ad Chick runs a little ad agency in Hooterville, U.S.A., and her Wednesday post, "Being a good client" hits the mark on a number of levels. I found it particularly interesting that it was driven by a client 1) realizing that they had been Behaving Badly and 2) wanting to turn that around. In all my years, I've never heard of that before.
For me, Ad Chick's list underscores the importance of respect and trust in the client-vendor relationship. (It's also a good reminder for those of us who put on the client hat when we sub out work to other solo entrepreneurs.) Not only is it more productive that way, it's a helluva lot more fun.