Be sure that people are able to share what you're posting to Facebook. Facebook lives on people who interact and share with others. When you put out important information, they will return the favor via informing their own networks of your content and possibly getting you more prospective customers.
Try your best to respond to each and every comment that you receive. This includes those you get in your inbox and the ones that are left on your page. It is not always easy to do so, but users will appreciate the personal touch that this adds.
Don't stray far off-topic in your posts. If you are selling houses, for example, it's okay to post about learning of the rates on interest changing if they are. Posting links to Harlem Shake parodies is totally off-topic information will only frustrate your fans.
Send everyone a note thanking them and include an announcement of the milestone you're celebrating on your facebook page. This will build your followers feel special and appreciated.
Don't assume Facebook is the best place that people go for social media purposes. This website is a great place to start with, but certain age categories and other demographics like others better. Research your target demographic audience is using the site as much as you think they use.
Answer all questions and respond to comments quickly. Thank them for contacting you, and follow it up with an answer to whatever they have asked you. Facebook Credits. Share links to your business's site or FAQs page to help answer common questions.