Accent pieces, artwork, and accessories may seem like decorating luxuries, but they can do a lot to make a room personal and inviting. Additionally, small pieces can be used to change the look of a room without a lot of fuss or expense. They can also be used very effectively to disguise a room's flaws; for example, a small room can be made to seem larger with a well-placed mirror, or with a painting that has depth.
Even when decorating a small area, like an entryway, accent pieces can be useful for showcasing your style and personality as soon as guests walk through your door.
Another important principle for any room, but especially small ones, is to eliminate clutter-clutter makes a space seem small and crowded; a room also looks cleaner if there is some empty space.