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To make a large living room more livable and less intimidating, create two or more distinct sections. Backless or low-backed sofas, especially L-shaped ones, are excellent for dividing a room without blocking line of sight or creating odd, tall distractions in the center of the space.  Dividing a large rectangular space into two squares often improves its appearance, as square spaces are almost always more appealing to the eye. You can use one or more sections for other purposes as though they weren't part of your living room, although the overall color scheme should match. An extra large ottoman is better than a coffee table for making a large space between couches or chairs feel cozy. A small couch will feel out of place in a large room, so replace a larger one or buy a second matching one and angle them slightly toward each other to form one side of your furniture arrangement. If all your paintings or wall hangings are small, place them in groups to make a large, pleasing arrangement that fills visual space. Tapestries tend to be larger and cheaper than paintings. An indoor potted plant you're willing to care for can add color and visual interest where there used to be empty space. Decorative figurines, sculptures, or ceramics draw attention to a smaller scale. Don't clutter the table so much it becomes unusable, however; one to four pieces on each one is sufficient. If you're interested in a complete redesign, using rich colors, wainscoting, or multiple colors to make the space less bare. Drawing attention to the walls makes your guests feel encompassed by the space in an intimate environment.
Use large, low furnishings to divide the room. If your room is too small to divide comfortably, fill space with oversize furniture. Use large wall art or multiple smaller pieces. Add tall house plants to fill corners and bare areas. Place accessories on tables. Paint or decorate the walls and ceiling.