"Ask why
Why is my son crying? Why is my son screaming? Is he tired? Were his feelings hurt? Does he feel scared? Is he hungry? Did he attempt something and fail? Did I not notice him when he was talking to me?
The point here is that there is ALWAYS a reason why. One of the biggest mistakes parents make is to assume that since their child is "just a kid" their emotions are "simple" and they should always be obedient, cheerful, and happy. Every tantrum, every moment of happiness, sadness, grief or elation has a meaning. If you think kids are robots and cannot feel these things, of course you are going to get mad. You're a kid! Just be happy and obey me!!!!!"

Awesome! I'll be saving this somewhere.