It's not easy for a parent to hold their temper at times. But, this must be controlled with a child; remember who is the adult and who is the child and set the example. The result of anger is sometimes abuse, so calm down. If you think you might "Lose it," take a five minute breather and walk away; tell the child that you will discuss the problem later. When you return, look at the problem openly, come up with a solution, and both parent and child will be far happier.