The most active ingredient in your direct mail piece is the response device. Here's an education in response devices from Clairification: How Your Nonprofit Appeal Response Device is Like Cheese. (It's like cheese because it "stands alone." Get it?)
- Include a compelling photo that tells a story.
- Put a heading on the reply card such as "Yes! I want to feed hungry children!"
- Include a big check-off box next to your heading.
- Include a succinct one-sentence summary of your case using active verbs.
- Show the specific impact of gifts at different levels.
- Pre-print the donor's name and address on the reply form.
- Limit the amount of information you request from your donor.
- Use paper stock that's easy to write on.
- If there's an adhesive seal, make sure no important donor information gets lost when the envelope is opened.
- Include a list of opportunities to designate gifts for particular programs.
- Include a check off for the donor to indicate they'd like this gift to be in memory/in honor of a loved one.
- Use 14-point font so everything is readable.
- Tell the donor how the check should be made out.
- Include your website donation page URL.
- Include a postage paid business reply envelope (test this; results vary).
- Address the return envelope to a specific person or specific campaign.
My advice? Always write the response device first, before you write anything else. That way, you know where everything else is going.