All walls are created equal in the square room, which means there's no narrow space that naturally pulls seating pieces together. The temptation is to scatter furniture helter-skelter, filling every corner with seating. The result looks fragmented and unformed; worse, the arrangement doesn't work well when it's time to talk.
Create a smaller square for conversation within the larger dimensions of the room. Instead of starting out by the walls, start in the center of the room and work outward with your major pieces of furniture. Ground the grouping with an area rug, and fill it out with adequate lighting. For details, scroll down below the plan.
1. Lay down an area rug first, to define your conversation space. 2. Don't point all your seating pieces at a single focal point, such as the fireplace, to the detriment of another practical view, such as the TV. An L-shape seating arrangement accommodates warming up to the fire and catching the game on the tube. 3. Don't leave your arrangement open-ended. Station a chair, ottoman, and end table in the corner, facing into the grouping. 4. Place an end table between the sofa and love seat, with a lamp that illuminates both; and include a sofa table behind the sofa with another lamp for lighting the far end of the sofa. 5. The well-furnished room needs attention in the corners, even though these don't participate in the main conversation grouping. Place two chairs between a small, shared side table in the vacant corner of the room. This provides a quiet spot for private conversation, even when the TV is on. 6. A narrow bookcase, sideboard, or console table fills a corner with display space without getting in the way of traffic.