Piimpin' Out Your Corporate Office?

ignoringReality asks: "I just moved into a new office at work that is considerably smaller than my previous one. The furniture is crappy, the walls are plain, and there aren't any windows. I'm trying to think of a unique way to keep myself entertained but not distracted day in and day out. It's a corporate office, so there are obviously limits. Working in a box must be a pretty standard situation for a lot of Slashdot readers, so how do you guys personalize your offices?"