In modern homes, this is unlikely to be possible due to space limitations, though traditionally, fireplaces were considered to be the ideal central element into a living room! But it's important to remember that the aim of your living room is being inviting to people, to obtain them to feel comfortable and relaxed, and stimulate good conversation. So even without a central fireplace, making the fireplace some sort of focus will also work well. Mirrors are a wonderful tool to enhance Feng Shui in a living room. They bring light into darker areas and can reflect aspects of the room that visitors might not exactly otherwise enjoy. Mirrors make rooms look larger (and lighter) and very usefully, they can reflect the door, so any seating that cannot face the doorway can still have the door visible through the use of mirrors. Just as before, we need to adapt this principle to modern homes and cities, even though the best placement for a mirror is the place where it can reflect a lovely view.