What Do I Do When I Am Mad?

Find a way to vent it without hurting anyone. Find a hobby, a sport or activities. Get a punching bag not your wife or GF or kids.  Worse case find some junk that needs to be destroyed to fit into the garbage can and have some fun making it into smaller pieces. But what ever you do don't take it out on others. Talk to a close friend thats neutral and can handle the cussing and swearing. Thats what best friends are for to listen and let you talk it out with your self.

There's nothing wrong with being angry or upset at times, because seldom in life does everything go the way that you plan or hope it to be.  Being mad is when you don't know how to deal with your anger.  Andie584's suggestion is great!