I am not perfect and I am listing some of these things because I know I am have done some them myself, but here are a few things that I see people getting wrong.
1. Not tagging you business as where you work. If you still have the "day job" I do understand, but otherwise friends may wnat to recommend you and quite probably don't the exact name of what "our Elizabeth" does. but they know you on Facebook and can follow the link from your personal page.
2. Post on facebook about your business news and having the privacy setting on just friends. I know sometimes times this is a mistake, which arises from not changing privacy setting back to your normal setting.
3. Just posting about your business and not interacting with others.