Check out these great marketing posts on other blogs:

Marketing Lessons from the World of Retail (by T. L. Higley on Christian Author Network blog). This one offers some specifics about Facebook.  Higley has other posts by the same title here and here.

Marketing Principles: Agent Rachelle Gardner features writer and marketing consultant Jim Rubart in a three-part series. Scroll to the bottom of the link to read the first article and work your way back to the top.