If you back down you're fucked and she will see you as weak! Stand up to her and say "Bitch there's the door and if you're gonna act like that fuck'n use it" (Doesn't have to be that harsh obviously, depending on the severity of her attitude, just the thought process to have.)
This reminds me of some guy (I don't remember exacly who it was) that he is married. And he once said: I take care of my family (kinds and wife). I give my wife everything she wants to be happy and I make her feel good. But if she starts to open her mouth and rant I say to her:
'See the door? the door is open. You are replaceable'.
Of coruse he was using it just as an analogy
it doesn't have to be this harsh and if a woman always rants then don't marry her. But the point is that no women is perfect as ManniJa points out. And esp. Today when women have so much social value it's going to be hard to find a woman that won't test you even once.
But remember there are more women on this planet than men. So there is no point in taking any drama from any women....
And let's remember that us men are also not perfect
The point is one does not need to worship women or think that they are perfect just because they are women (not saying you are ATZ just talking in general here).