Are you a networker?
Do you do social networking? Facebook, Twitter, Linkedin, Yahooo groups??
Do you attend your local BNI group? I visited a group this week and there were over 70 people there. It is an awesome group. They only allow one type of business per group. Each person in the group then works as a referrer for your business. It is a great group and this year they have generated over 3 million in sales for there group.
Networking is a very powerful form of word of mouth advertising. If you are not doing it, check out some of the these ideas.