"The only way to address your anger is to address it's source." Yes maybe, but there are things you can do within yourself to deal with and heal the anger issues.

Emotions are normal, when they become extreme they start to effect us, the typical western view of health takes no account of the effect of emotions on the body.

Anger in Traditional Chinese Medicine is considered to represent resentment, frustration, and irritability. This is associated with the Liver.

We can manage this in many ways through diet, herbs, things like acupuncture. You have listed some good strategies as well, breathing is a good one deep breathing.

Does your family lineage have any history of alcohol related problems?