I think more important than not getting angry is coping with the consequences of that anger. Everyone gets worked up and it's very hard to control your actions when you are in that mind set. But if after you yell at someone or say something mean and realize it take advantage of the fact that you are aware of your mistake and make sure others know you did not mean what you said or feel bad for how you acted.

Doesn't it feel better when after someone makes you feel bad and they come out and apologize or explain why they had acted that way? I don't think most people MEAN to harm the ones the love even if their relationships are complicated.

Openness and honesty about your actions is always helpful to everyone including yourself even if sometimes you feel like you can't control them, take advantage of the times that you are aware and able to.

I don't have many suggestions on how to not become emotional or angry in the first place as I too am dealing with trying to control my actions. It's very difficult but the more you are aware of your problems the easier it is to address them.