Tools to Grow Permission-based E-mail Lists

2. Send postcards to customers encouraging them to subscribe to e-mail. This works well for catalogers that have postal contact information for customers, but lack e-mail addresses, the whitepaper found. Consider sending them with an opt-in sign-up offer and URL.

3. Add opt-in check boxes on demo requests, whitepapers and registration forms. Well-executed forms and pages can improve conversion rates by 50 percent or more, the report said.