Don't worry, I shall return to bitching about garbage again soon.
For many many MANY years, I worked solely in restaurants, which have their own set of "office politics". I now do both office and restaurant work (because I am a glutton for punishment apparently).
Being a team player: The office I work in has about 15-20 staff members, organized over two floors. We have a receptionist who is often away from the front desk and it then becomes a battle of wills to see who will answer the bell at the front desk. I basically always lose this game. There are two reasons for this, firstly, I receive slightly more visitors than other employees and therefore feel a tinge of guilt that it might be for me; secondly, with as many years in the service industry as I have I can't be that rude. Clearly none of my coworkers care about our visitors.
Slacking: If you work in an office there is a good chance that you have access to the internet. There is also a chance you access the internet for non-work related things (like, y'know writing a blog post). Keep it to yourself people! None of us want to know what great video you just saw on youtube, what your friends are doing on facebook or have you read out "silly laws that are still on the books". We are all
Coffee: If you take the last cup, or even the almost-to-last cup of coffee, brew more. As a side note to this, after all those years working in a restaurant where many times I had discovered that a coworker had taken the last of the java without brewing more, thus screwing my service to my table over, I take great joy in NEVER brewing coffee at the office - I'm a tea drinker, so you know I didn't take the last cup!
Wash out your damn coffee cup!
Bathroom use: If you take the last of the toilet paper, freaking change it. Leaving one square is the equivalent of leaving a sip of coffee in the pot. If you need to do some, uh, secondary business, while you're in there, that's okay, Everybody Poops. Please do not then spray half a can of air freshener in the bathroom and then close the door and leave the light on. We will all keep presuming that someone is in there, and man, I gotta pee!
Of course there are many other things that could go into an office etiquette guide, I quickly checked the Oatmeal but didn't find one to go with this post, but I'm sure something awesome exists somewhere.
*For the record, this was written on my lunch break. Mostly.