Currently the third-largest residential real-estate company in the United States, Keller Williams is a full-service firm that deals with the sale and rental of both residential and commercial properties. J.D. Power and Associates ranked Keller Williams as the highest in overall customer satisfaction in 2008, 2009 and 2010. Keller Williams also has a semi-monthly publication called OutFront that focuses on success strategies among its associates. For more information, check out the website.