Consider including a copy of Stained Glass News with your newsletter, or even using SGN as your newsletter, and inserting a sales flyer each quarter. If you know who you're trying to reach it's often a simple matter of finding an organization that keeps their names and addresses on file. Home builders, interior designers, contractors, architects, and so on are all members of their own local or regional associations. These groups are often willing to sell or rent their mailing lists. They accumulate and sort mailing lists from yellow-pages nationwide.
All lists are available by state.
When you use direct mail, make an effort to measure its effectiveness. It's easier to do with this medium than any other. Simply include something in your message that will enable you to identify respondents. In addition to these techniques, get in the habit of asking people who contact you how they became aware of your store or studio, and have your employees do the same. You need to know which of your advertising endeavors are the most successful.