I've met a lot of my current friends from jobs I've had over the years. I was always happy that if I left to go somewhere new, I tended to stay in touch with people and further our friendship. Being friends with people in the office usually makes a lot of sense. It helps you with job satisfaction, and let's face it, knowing you'll have a friendly face there makes it easier to go in everyday.
Your behavior in the office can help you when it comes to making friends, or hurt you. Sometimes it's easiest to see which types of behaviors you should avoid if you want to click with people. Here's my list of ten things not to do if you want to make friends at work.