Perhaps if your customer uses your service or product and they can get an incentive for passing along your business postcard or information to get themselves a discount or something in one way of getting more business and to widen your circulation without having to do it yourself. Using direct mail design with deadlines, incentives and simple coupons and explanations you could very easily grab yourself quite a few more customers should you offer a reliable product or service. Don’t forget you have to stand by and back up your claims you are making in mailings and advertisements you send out or post anywhere.