Putting a magnet on your truck with your business name? maybe go to a small hardware store that sells mowers, trimmers, blowers etc. and see if you could advertise out in the front. or if someone were to ask for a small engine mechanic they might refer to you. and also, word of mouth is the best. if you get something that is easy and cheap to do like say, sharpening the blades on a mower, do it for free one time or dirt cheap then people will talk. just different thoughts.