The best approach is to prepare for obstacles ahead of time when you know your weaknesses. Above all, you need to calm your mind so it can handle sudden, violent shocks without getting angry. Or if anger does flare up because of some unexpected wrong, you can bury it deep and not show your wound. This is possible to do. I'll share some examples from many I could choose. These will show two things: how much damage anger causes when it has complete control over powerful people, and how well it can be controlled when fear keeps it in check.
It is best to prepare obstacles beforehand for vices which are known, and above all things so to tranquilize our mind that it may bear the most sudden and violent shocks either without feeling anger, or, if anger be provoked by the extent of some unexpected wrong, that it may bury it deep, and not betray its wound. That it is possible to do this will be seen, if I quote a few of an abundance of examples, from which we may learn both how much evil there is in anger, when it exercises entire dominion over men in supreme power, and how completely it can control itself when overawed by fear.