Allow more light to enter the living room area by using light curtains. If possible semi transparent curtains that are ample to reduce glare that could be caused because of direct sunlight, instead of using heavy looking "valances" use simple and easy. Use brighter color schemes commonly known as "hot" color schemes. These create a very good reflection and transmission of natural as well as artificial light inside the living room. There is one more different method to defining the perception 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 usually "relative". The perceived volume is always relative to the empty volume that may be normally used for circulation. The more empty volume you get, the bigger the room will look.