Back in the 1990s, I experimented with putting yellow post-it notes on the outer envelope of my clients' direct marketing campaigns. In those tests, we saw a 12% to 30% increase in response.
The post-it note was effective for both consumer and business-to-business mailings. However, this direct marketing technique was most effective with business to business.
Since that time, I’ve continued to find it to be effective and hope to test it on a magalog in the near future.
If you have had any experience using post-its in your campaign, let me know about it! Contact me at inquire@cdmginc.com or call me at 310-212-5727.