customers want to see you, build your round up on your personality! at the end of the day from what i have learnt doing this for a little over a year its the relationship that will make people stick with you ( and doing a good job as well) also keep the round tight to where you live.
get yourself a google business page, to start with, and as you get customers and you develop a relationship with them get the to leave a review on your page for you( text them a link to your pages facebook as well, yell to ,) what some people do is when looking for a window cleaner is jump on google and look for window cleaners near them. ( google it your self ... loads will come up some with 1 or 2 reviews some with more.) you should view it as a challenge to get the most!!! may take a bit of time but who are people going to ring the guy with no reviews or the guy with 7 8 or 9 five star reviews.