Brett and I do this a lot. Things will start to get heated and then we'll call ourselves on it. "I'm mad a me, you're mad at you,but we wont back down b/c we feel stupid." Just laugh at yourself and move on.
#4 is insanely important for me. If I am put on the spot I usually can't think of anything to say. #6 is important too. Even if it is something I like I probably won't go if I don't have time to mentally prepare