When you feel anger coming on, get away from the situation and cool off before responding. Tell co-workers what's bothering you. Don't play the blame game. Set the standard and avoid gossip. If the people you socialize with most are critical, talk together about how the atmosphere can be improved.
Laughter can alleviate tension.
Try putting up a joke board. Avoid sarcastic or offensive material. Learn to relax. Practice relaxation techniques such as deep breathing or counting to 10. Just say no.