Allow more light to enter the living room area by using light curtains. If possible semi transparent curtains that are just enough to reduce glare that might be caused because of sunlight, instead of using heavy looking "valances" use proven and. 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 perception of the living room (or any interior space) and that's the empty volume left behind after all the furniture together with other accessories have been fitted. Because anything within our living world is definitely "relative". The perceived volume is always relative to the empty volume that is normally used for circulation. The more empty volume you get, the bigger the room will look.