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