You don't always have to move items to the other side of the room. Use plants in small containers that can be moved around a room, or into other rooms. This is good for the plants, so they get the right amount of sunlight. Change your throw pillows. Get some extra pillow covers in different colors.
Pillows provide an easy way to change the color in a living room.
Don't forget about the air. Change the scents that you use. Potpourri, candles, air fresheners, etc. are very cheap. I have an easy recipe for gel air fresheners. Change the photos in your frames.