The University of Colorado suggests recognizing your feelings as well as the emotions of the person you're speaking to before saying anything you might regret. By taking a step back and re-examining the situation, you can treat the issue appropriately and determine how extreme you should be.
MindTools.com also recommends thinking about the last time you were frustrated when you feel your emotions start to boil over. Did your negativity solve any problems? Recognizing the lack of productivity that came from your anger can help you calm down.
Perhaps your job is simply too stressful and it's in your best interest to take a different career path. Consider speaking to a psychic advisor you think that this may be the case. Psychic readings can give you insight into how your current job is negatively affecting your life and when a new career opportunity is bound to sprout.