What's a good way to get bible pushers off your doorstep?

I used to live in a Jewish neighbourhood and when the mormons, jehovahs, etc came a knockin' I would say I was a Jew and they would scamper quick smart. I've since moved far far away from any synagogue and this trick no longer works. Excluding the obvious like 'no thanks' , being rude, telling them to F off and/or slamming the door in their face, can anyone suggest a smart answer?