I’m going to assume you already maintain a Facebook account for your business; in fact, I know of some companies with Facebook accounts that never bothered building a separate website. I won’t go into the logic behind that. Right now, I’m just going to assume that your business is on Facebook, and you’re hoping to use the social network to help it grow. That means you need to learn how to make and keep friends on Facebook without annoying them. If your company includes a physical presence where customers show up, you can start making Facebook friends simply by mentioning that you have a Facebo…