There are no guarantees you will gather a profitable following on Facebook.
Make sure that all content you publish online is at least linked through your Facebook. If you write a blog, configure Facebook to automatically include a link and summary of your post. You might even link a Twitter account to your Facebook page and make sure tweets show up there as well.
Try using Facebook ads for your business. Posting to your page will only goes so far. To attain more reach into your market, Facebook ads may be ideal. They cost very little and can have a marketing punch.