http://www.jesus21.com/content/faith/index.php?s=bible_believing_trickswarning: the link has a few adult themes. Its a site sorta like Landover Baptist.
Here are some of the tactics that you can use to show that God is on your side:
First, contrary to what you might think, it's not necessary to read the Bible to discuss it. In fact, reading the Bible will probably only confuse you, and you need to be absolutely 100% certain of your position, without any troubling ambiguities or contradictions causing you doubts. Remember, your degree of certainty is directly correlated to the truth value of your argument.
When framing your argument, use words that aren't actually in the Bible like "abortion," "homosexuality," and "pornography."
Demand answers to irrelevant questions, such as "Have you had an abortion?
Attack your opponent's credibility. If she has had an abortion, tell her she's not qualified to discuss the issue because she's only trying to justify herself. If she hasn't had an abortion, tell her she's not qualified to discuss the issue because she can't know what it's like to have gone through an abortion.
Tell her she's thinking with her head, and not her heart. Meaningless and irrelevant statements like this will baffle her, and she may lose her concentration while trying to get the argument back on track. More statements like this can be found on Christian bumperstickers or in the Congressional Record
If your opponent quotes the Bible tell him you're not impressed, even the devil can quote scripture.
Tell her you didn't mean to get her so angry (this works best with women), that as a Christian you love her, and will pray for her. Whatever the response, say, "Please don't get so emotional. I can see that you're clearly disturbed." Rinse. Repeat.
Accuse your opponent of "hating God," and/or "hating Christians." Ask her what happened to her in her past that made her turn against God.
Of course, there are more there, but I can only post so many here...