I really don't know why JWs call going door to door "preaching the good news". It's really not all that good. Their message: Join up with the JWs or die at armageddon. Sounds like a sweet deal to me (excuse me while I vomit).
If you were to go door to door, preaching good news, what would your message be? Cmon, get creative.
My message: Oral sex is fun & exciting. Do it!