What makes you mad? The restaurant messing up your friend rice order? A long line at the post office even you only been standing in less than two minutes?

How about bad or clueless drives that cut you off in the traffic light? Are they really that bad? Or they are small matters but you want to escalate the situation.

Instead of getting piss...why not a be more understandable and forgiving?
You never know someone will understand and forgive you as well someday when you find yourself mad.