- The U.S. Postal Service has set up Business Centers in every state to assist businesses with direct-mail marketing efforts. Contact your local post office for the location nearest you.
- The Direct Marketing Association is a good source of information and advice to help you improve your direct-mail marketing results. Contact them at 1120 Ave. of the Americas, New York, NY 10036-6700; (212)768-7277.
Rein Associates, 837 Broad St., Shrewsbury, NJ 07702-4201, (732)741-8111