Web site, Angie's list, yelp,thumbtack and referrals.
Mostly residential an some commercial flatwork here and there.
Our business is up from previous years so fa just keep on plugging away and enjoying the the ride in the process.
I also started out with 0 experience by reading as much as I could find on pressure washing what ever surfaces I was going to be cleaning. 3 yrs later still going with it at a part time washer.