Preventing yourself from overreacting is simple, at least in concept:
Focus on the outcome you actually want.
That means:
Train your mind to think about results before you act.
It really is that simple, even if hard for the hot tempered. You will not always succeed, I don’t. But that is the goal. In the heat of conflict, most of us start by justifying our intent. We tell ourselves why we are right or offended, and why the other person deserves what is coming. But after the moment passes, that is usually not what we judge. We judge the result. We look back and ask whether we made things better or worse. So the smarter move is to get there sooner. Shift from defending your feelings to asking what outcome you actually want.
That is hard because conflict narrows the mind. Anger, fear, and insult create urgency. Your body prepares for action before your better judgment fully arrives. That is ancient biology doing what it evolved to do. But modern life is full of conflicts that do not need maximum force.
The mechanics are simple, even if they are not easy. Stop. Breathe. Count to ten if you need to. Put a little space between the feeling and the action. Then ask yourself a better question:
What result will I be proud of later?
Over time, that habit can turn conflict from something that controls you into something you handle with proportion, dignity, and better results.