1)The first trick the missionary will use is redirection. If a missionary senses that he will be refuted, he will immediately change the subject and switch to another verse.
Do not allow him to change the subject or to go to another verse. Hold your ground and finish explaining the verse in question. Only when the verse has been completely explained, should you continue in the debate.
2)The missionary will use speed, quickly quoting and making his point quickly. This is an attempt to show you his knowledge and to keep you from thinking. You don't have to race! Slow done the pace and take your time. The last thing a missionary wants is for you to think .
3)The Missionary will almost always start in the middle or end of a chapter.
Check the beginning of the chapter and verse which follow the one in question. Nine times out of ten it will be enough to refute him.
4)Missionaries will try to make connections between unrelated things using logic. Think!Think!Think! Then respond, for if you listen closely to what he has said you will see the trick and be able to us it against him.
5)Do try to debate someone, unless you are knowledgeable in the proper responses. This applies more to public debates than to personal. If you do debate and the missionaries brings a point that you can not answer tell him that you don't have all the answers and just because I can't answer does mean that there isn't an answer.