By using light curtains, allow more light to enter the living area. Instead of using heavy looking "valances" use easy and if possible semi transparent curtains that are just enough to reduce glare that may be caused because of direct sunlight. Use brighter color schemes commonly known as "hot" color schemes. These create a very good transmission and reflection of natural as well as artificial light inside the living room. There may be one more different strategy to defining the thought of the living room (or any interior space) and that's the empty volume put aside after all the furniture as well as other accessories have been fitted. Because anything in this living world is always "relative". The perceived volume is always relative to the empty volume which is normally used for circulation. The more empty volume you get, the bigger the room will look.