Do it right: Seven ways to control your temper
How to avoid letting your mouth get you into trouble...
Take time out. Counting to 10 really can help stem that rage. Put physical space between you and the person or situation that has got you riled.
Lighten up. Using humour can diffuse tension in tense situations. Avoid sarcasm, though; it can hurt feelings and make things worse.
Get your facts right. Make sure you ask a lot of questions before jumping to a conclusion that could embarrass you.