[Imampaictjg]

Mindfulness helps because you are aware of anger rather than feeling that you are the anger and so are not quite so involved with it. waiting for anger and then trying to be mindful obviously would not work though, mindfulness needs to be practised for a long time to be of any real help in stressful situations.
I listened a Gil Fronsdal Dharma talk where he advised taking time to look at our motives for our actions, whats really driving us? I've found this helpful because as we start to understand whats going on within us we are not so compelled to act.

But waiting until the event to develop these things is like waiting until we crash the car to decide on taking driving lessons