Side tables in general are meant to complement the centered coffee table in a living room. However, a coffee table can sometimes take up valuable space in your room and obstruct traffic at the same time. In such scenarios, side tables can function as a small coffee table. More than one side table combined together can also substitute for a slightly larger coffee table. See examples below.
source: http://www.houzz.com/photos/31464/South-of-Market-living-room-contemporary-living-room-san-francisco
One side table can also serve the function of the coffee table. It takes very little space and can be moved around easily.
source: chiasso.com
Side tables look best at the ends of the sofa if they are almost the same height and depth of the sofa's arm. If they turn out to be a few inches shorter in height you may end up dropping your cup of tea. On the other hand, side tables higher than the sofa's arm will be visually disturbing and obtrusive. In the example below from westelm.com, the white side table is lower than the sofa arm.
In the example below, again from cb2.com, the end table is the same height as the sofa arm which makes it visually pleasing and functional.
Combinations of dark and light woods in a room makes it visually interesting. Similarly, metal and sleek lacquer are beautifully paired. There are so many interesting side tables to choose from, it can be overwhelming.
source: westelm.com, vivaterra.com, chiasso.com, orange sallystool, brass Indian stool
Finally, accessorizing the center and the side tables are very crucial towards your room's design. A beautiful vase with flowers from your garden, an intriguing book, and a mantel piece provide warmth and elegance to your room. You should not clutter the table at the same time.
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