The first step to a direct mail marketing campaign is to determine a goal, what do you want to achieve from such a campaign and zero-in on the target audience. A list of existing and old customers is a good place to start looking. Select the type of mailer you want to send — flyer, letter, coupon or catalogue etc. Design and style your mailer to deliver your message in a catchy yet effective manner that appeals to your target audience. Keeping text concise and relying on visuals can help. Lastly, make sure your incentive is tempting enough for the customers to respond.