Craziest Mailing Campaign!

[Nelly Licona]

I am about to start a mailing campaign, I  believe I have done enough research to get it going... 

I have read all the different ways you can increase your response rate, with things like adding a piece of candy to your letters, or using more than one stamp, or using blue envelopes, etc...

What is the craziest combination of marketing you have done and how did that impact your response/deal rate?

I appreciate everyone sharing! =D