Some things to consider, is your room large or small? Does it have multiple traffic patterns? What exposure to the sun, is it a southwestern light? Do you have one large window or several smaller windows? Does your living room have a natural focal point? What do you like and what don't you like about your living room/ great room? Do you need storage?
Let's use the room below for a living room makeover. This room has two traffic patterns. A focal point in the room is the fireplace. This room has plenty natural light and is not a very large room. The floor to ceiling windows and door increase the visual size of this room.