Jellies who work out of a cubicle: Any advice on how to keep from going stir crazy?

I’m not accustomed to working in a traditional office setting, but for the next week or so, I’m going to be cubicle-bound. After going through a couple days of office life, I’m feeling mentally drained. Being enclosed in a tiny space, staring for hours at a computer screen, and dealing with the ever-so-scintillating office chit chat has begun to take its toll.

So, for those of you who work in a typical office setting, what do you do to make the day go by a little quicker? How do you deal with being cramped up when you have the urge to get up and move around? Do you have any tips or tricks to share?

Please help me, I don’t want to turn into Milton Waddams.