I would put somethings up there, likely I'd just move some of the taller books and trinkets that you already have on the shelves. I'd also arrange the books by color and size (all the red books together, from tallest to shortest).
I'd also probably add some easy to care for house plants to the top. Or, maybe a large pair of matching vases, one for the top of each shorter shelf.
Married07.07.07.Mom to 3:Ruby 11/08and Oliver & Austin12/11
Re: decorating ideas please