The best way is go out door knocking and sell yourself to the householder, don't get put off if you get a run of people saying they allready have one because your just getting closer to the one that says they want your service. Also don't price cheap just to get the work as you will regret it. If you have a flyer made up then get it put up in a local shop or news agent ect and of course once your out cleaning you will get aproached by others to do there house.
Good luck