I typed in pressure washing and Roger your on the first page but then added leicester and there were several. Web sites won't bring in work overnight on their own, you need to work to refine key words, links and good content before they come up natural listings. As you saw directorys help, and the best way of finding these is to type in your competitors and see what their on. I did customer street in my area and that has brought promising results but that was for drain jetting and it is early days yet. The best advert is your good work and word of mouth - its free but takes a while