Lifehacker reader JonesyVan's workspace looks like your typical cubicle. Hidden in the filing cabinet, however, is some serious entertainment for break times ("when Bossman decides to exit his office"): a wall-mounted TV and Xbox 360.
This is definitely one way to make your cubicle more comfortable and less boring, although for a similar set up you'd need that wall-mounted cabinet with a sliding door. (I'm not sure how long or how well you can hide this from your fellow cubicle dwellers either.)
JonesyVan also keeps entertained at his desk with a sevel-litre fish tank housing five Tetras and three snails, as well as a collection of Rubik's Cubes.