Stop fighting

Well! This point has been already discussed to some extent before also. Keep silence, when you think things are going to some other direction. This will help in stopping a big argument that can lead to a fight. But there are a number of times when staying silent can lead to a cold war. If you think that such a situation is going to happen, then take some time and then change your mood and start being normal to her. If you start behaving normal, she will automatically get back to her normal mood.