u could just pretend that u are one of them. usually i tell them what i church i go to and they leave me alone.

put a sign on your door that says that you worship the devil

Like death, it is something inevitable. There really is nothing you can do.

Its irritating having Jehovas witnesses come to my house and preach....after I told them I am Catholic.

Open the door wearing viking wargear and ask them if they know any churches that can be pillaged nearby :)

You people don't understand how difficult it is to be a *ahem* preacher. Try and respect how much trouble these people go through.

Give them a buck donation and a smile. If you tell them you're happy with the way things are going for you and you're not interested then:

a) You won't feel pissed afterwards
b) You didn't act like a typical "anti-religious" person and will give them something to think about
c) Following in the footsteps of Pascal, you're donation can't do any harm - only buy some insurance

So be a little different this holiday season.

Just put up a "No Soliciting" sign.

Personally? Just tell them you're gay and they just interrupted you in the middle of playing "Hide the salami" with your boyfriend.

With that said...

a) It gives me a laugh.
b) They shouldn't act like a typical religious person.
c) I refuse to give money for the right to pray to a God, any god. Do it in your own home where it's free, pluys whatever God you worship shouldn't really  care. - Besides... Churches are rich enough.
Give the money to charity where it will do more good.

i only donated if i know what exactly it is going to i have heard many times priest just take the money for them selfs 

Fence your house and put out a no trespassing sign would prolly work.