There are things you use every day to enhance your cubicle standard of living. Necessaries are a classy "I Am At A Meeting" sign that temporarily clamps to your wall railing or doorway. This shows consideration
It can also be twin rear view mirrors attached too your monitor. (They really are watching you),... or it can just be a toy or a tape dispenser.
Whatever it is, it is not decorative but it is useful and it shows imagination.