The following two sets of handouts are great to use when teaching classes at your church and for having them handy to give to the Mormon missionary when they knock on your door!
The most important thing to do of course is to pray!
Remember, you’re not there to convince them to leave Mormonism at that moment. You’re there to plant seeds and share the truth about Jesus. It may seem daunting, but don’t despair! Because of the kindness and love afforded to me by many Christians, I came to know the real Jesus of the Bible and got saved! Hallelujah!