Well back when my Dad started his business, he just started doing jobs for people that he knew, and that his parents knew. And after each time, he would of course leave his number for the next time they need his services. Well of course after he would do the job, they would talk to there friends tell them "hey, if u need your carpets cleaned..check this dude out". So needless to say he started getting customers that way. I also think after awhile he took out a small ad in the newspaper....that was 27 years ago, lol.
Hope that helps some doooooooooog.