I tend to be a "cluttery" decorator. I'm learning, slowly, not to stuff every nook and cranny. Simple can speak for itself.
I read in a book recently, "God doesn't give us a flaming sunset to look at all day long". It was meant as an explanation of how to use color when decorating. Use colors that are soothing to look at in large doses and use explosions of color sparingly. I thought that was very helpful, and I'm trying to follow that advise a little more.