Mantels are so perfect for decorating because they are out of the way flat surfaces that can display your cool stuff. Even though I don't have a mantel, I do have other out-of-the-way-flat-surfaces-that-can-display-my-cool-stuff.
Ta da! If your thinking that looks like the top of a piano, then you would be correct. I don't know why I never viewed my piano top like this before but is the perfect place to decorate like a mantel by swapping out seasonal decor. It's the perfect place to fiddle with when the decorating itch takes over.
I've already started messing with some other decorating objects I have on hand.