1.add a designer rug.
A great rug can set a room apart completely. usually its the last thing designers think about. but rugs can really make a statement.
If you feel like your room is looking a little plain. add some cool accessories and trinkets. stacked books on the coffee table. or cascading candle holders. maybe some weird geometric shapes. have fin with it.
3.add a mirror
Adding a mirror goes with about any style. it makes the room feel more open and larger.
4.take the focus off the tv.
dont make the tv the reason people are coming to the room. face couches towards each other and maybe hang a nice peace of art in the center.