Always carry something when you're walking through the halls. This way you'll look busy and less people will bother you. It's a good idea to wear an anti-static wrist strap before opening a computer. That cracks me up. No matter how thirsty your keyboard looks, it's not ok to give it soda.
Water is much better for it.
Always backup user data before working on their machine. That way you can browse through their personal stuff at your leisure. Another thing that end users love is when you tell them that every work or hardware request must go through their manager. The best way to make friends is to deny people's Internet access, or to tell people that you're watching them while they're online. The easier a job is, the longer you can put it off.