If you are confused and can not find a solution to the torturing problem, sit before a mirror and start saying the situation aloud. At first, you will think that it's a little strange to do it, but then you'll get accustomed and it's very likely to "agree" to the right decision.
If you just need to ease, take a warm shower, you can even cry under the jet of water, sing your favorite song, yell or scream - whatever you wish. Then have a rest and you will feel quite good.
To prevent stress, do more action, make physical activity, sport. If this is possible,put a tennis table in the office, and relive the psychological tension by shooting the ball with the racket-you will learn to play at the same time.
But the main thing is try to evaluate our own behavior in a given situation. If you acknowledge your mistake, then apologize to the involved person, and be simpler and kinder to the people around you.
Be a diplomat with your chief, and with colleagues. Try calculate your behavior and that of yor fellow, guess their thoughts. But be careful: the line between diplomacy and fawning is very thin. Assessing your own opportunities establish a goal and follow it clearly.