3. Use an Area Rug
This is a great way to define a conversation area and look for one which will complement the décor of the room.
Rather than lying it straight, put it at an angle underneath your coffee table (if you have one).
Or if not, then just place it in a central location where the seating is situated. Why not add some large cushions as well?
4. Pictures & Mirrors
Hang those which most reflect your personality. If you are able to, try frames that are more ornate.
Plus, when hanging a mirror, place it in a position where it will reflect either a nice view or an interesting architectural element of the room.
Including a mirror in a room also creates the illusion of more space in a room because of the light reflecting off it.
Replace lamps, as these are one thing that will provide clues to your room being outdated.
If you are unable to replace the whole lamp, then just consider replacing the lampshade instead.