Speaking of The Office, I suppose it's no surprise that much of my inspiration for this guide comes from Dunder Mifflin. For all those coworkers who deserve special recognition, why not pick up an armload of Dunde Awards? They come with interchangeable faceplates, so you can always give someone the Whitest Sneakers Award first but change it to the Bushiest Beaver Award behind her back.
For the regional managers on your list, consider some Michael Scott-endorsed desk decor, like this expanding sphere toy. (If you want to send some subtle hints about stress relief, check out these Dunder Mifflin stress balls.)
No matter how crazy your office, just remember: You could be working at the dysfunctional tech company of Douglas Coupland's Microserfs. The book is especially apt for any of your techie friends who might get a kick out of prose punctuated by emoticons and ridiculous acronyms.
And if you know someone in need of some cubicle "flair," consider these Office Space bobbleheads. There's one for Peter, his obnoxious boss Bill Lumbergh, and of course, the stapler-wielding Milton. These just may cure your friends' "case of the Mondays" for good.