Ever use radio to advertise your Lawn Services? I have yet to do so myself. It can be a little pricey but there are many benefits. Small stations are local so you can hit your favorite audience (people close to you). This keeps you from having people 90 miles away call you for an estimate for a small job. Radio also builds name recognition. If a person hears your business name over and over it is like a friend is telling them about your business all the time. And when they need a service that you provide they are likely to call you first. check with your local radio broadcaster and see if you can even barter (exchange services for radio time). This can give you a feel for it before jumping in all the way. A great book to help with this method of marketing and much more is Guerrilla Marketing.