Get in the mailbox early.  Test your acquisition campaign to see how early you can be in homes without negatively impacting results.  This does two things for you:

1) It gets you in the mailbox before the competition, and,

2) It allows you to build a frequency component into your strategy.  If you’re in the mail in early September, you’ve still got plenty of time to re-mail your multi-buyers in October, then put a third mailing out to the entire audience again in mid-November.  That’s three touch points to your acquisition audiece during the most critical fundraising period of the year.  And that’s a lot better than just a single attempt.