The biggest mistake you can make is choosing a coffee table that is too small for the space. When in doubt, go larger. If you have a hard to fit or awkward space, consider a custom-designed table. Also, simplicity and quality are key. Unlike some furnishings that are mainly for show, coffee tables serve a function, so you want something that wills still be in style next year, and withstand constant use. Tables with stone, marble or wood tops are very durable and well-equipped for everyday spaces. Antiqued mirror or glass tops are more formal and fragile, so they...