One of the major costs associated with running a business is advertising. Advertising can easily cost up to 25% of a business's revenues directly eating away at your profit. Traditional advertising such as direct mail, newspaper ads, radio, and television ads are cost prohibitive for most businesses. Modern forms of advertising online such as YP.com (formerly yellowpages.com)and Google can also be very expensive for a business. What can a business do to cut advertising costs? In this new world of social media there are 5 great sites every business should be on and the good news is they're free! Here they are: