Keep an upholstered ottoman 18 inches from a sofa or chair, so you can easily put up your feet, and make sure the height is consistent with the surrounding seats. If you get a tufted ottoman, consider the depth of the tufts — especially if you expect to eat on it. Crumbs will find their way into the tufting and are not always easy to get out. Round coffee tables aid circulation, especially where there are many available seats, as in this example. If not every seat can reach the table, make sure there’s another surface at hand.