Warm Calls after Direct Mail

This concept works, the problem is most people don't do a large enough test to get accurate data. You need to mail hundreds of letters to get actual data. In reality most real direct mailers say you need to mail a minimum of a few thousand pieces for your data to be statistically accurate.

I am not here to discourage you:

But one might say its a beginners luck,

So how about selecting a area code or a zip in your city, Sending about 1000 mails, and wait for results repeat it for 3 other zips or area codes, and compare the data, lastly understand the behaviour of people and try to act accordingly, Once you get results after your tests, it will be clear for you and much more easier to make decision based on the data you will have. Good luck
Thanks