Lighting sets the mood and tone for each of your rooms. Lighting is also safe and functional. By having a mix of light sources at different levels you will create a comfortable and inviting atmosphere while you choose appropriate lighting for whatever you do in that room.
For your living room consider having light in three of the four corners, focusing one of those lights on an object such as a picture, a plant, or your favorite furniture. Use a combination of table lamps and floor lamps, some with a downward glow and some that shine upward. Use down-glowing lamps on three-way switches over each piece of furniture you will spend time reading there, such as your sofa and favorite chairs.