1. count to ten (forwards, backwards, foreign language....) Gets your mind to change and think of something else.
2. Go for a walk
3. Deep breath
4. Read a book, article, back of a cereal box.....
5. Exercise
6. Color, actually relaxes most
7. Do a crossword puzzle, suduko, anything that gets your mind off the problem at hand.
8. Play a video game
9. Go somewhere and scream, let it all out.
10. Use the problem and dissect it turn it into a positive.
The use of a tool that helps you, is to get your mind off the cause of the anger and to give you time to think more clearly and be able to talk about it without getting angry and saying or doing something you are going to regret. You have to find something that will best suit you to help in that situation.
When you deep breath, breath in through your nose, hold it for a few and slowly through pursed lips exhale through your mouth.

Good Luck!