This article offers some tips for making the practice of growing your opt-in list simpler. In short, you should:

1. Position the database as a critical asset.
2. Capture data everywhere.
3. Track and analyze data by source.
4. Promote the benefits.
5. Let the customers tell you what they want.
6. Provide examples.
7. Have a conspicuous privacy policy.
8. Send thank-you e-mails.
9. Leverage highly opened transactional messages.
10. Gather and enhance profile data.