You shouldn't sleep on it.
The saying "never go to bed angry" is valid advice. Going to sleep may reinforce or "preserve" negative emotions. Sleep enhances memories, particularly emotional ones."Sleep seems to help us process and consolidate information we acquire while we are awake". So going to bed after an argument will likely cause that experience to be consolidated more effectively than if you went on to remain awake for that same eight-hour period.
You shouldn't drive.
Operating a motor vehicle when you're enraged can be dangerous. Research shows that angry drivers take more risks and have more accidents. "In addition, anger gives a person tunnel vision -- you stare straight ahead and may not see a pedestrian or another car coming into your peripheral vision crossing the street." If you must drive when angry, open your eyes purposefully and look around you to avoid tunnel vision.
You shouldn't vent.
Getting anger off your chest sounds like a good idea, but it may actually make matters worse. In fact, people who simply spent five minutes reading another person's online rants became angrier and less happy. A study also showed that venting anger by hitting pillows not only increased anger at that moment but made aggressive behavior more likely in the future. "They feel validated in what they're saying by venting, but they're not less angry."
You shouldn't eat.
Soothing your anger by reaching for food can backfire in a couple of ways. "When we are angry, we often make unhealthy food choices. No one ever reaches for broccoli. We go for the high-sugar, high-fat, carbohydrate-loaded comfort foods." In addition, a heightened state of emotions sparks the fight or flight response, where the body thinks it's in danger. In such a state, digestion takes a backseat to the "emergency" at hand and does not function optimally. This may result in diarrhea or constipation.
You shouldn't keep arguing.
Staying in the conversation when you have difficulty modulating your anger makes it likely you'll say things you'll regret. "If it's possible you will say hurtful things that you'll regret and can't take back, ask for a 'time out' with intention to come back to the conversation". You may need 10 minutes or 10 days. "It's the willingness to come back to the conversation and initiate that is key". Use the time out to actively calm the mind and the body so that you express yourself in a more mindful, intentional manner.
You shouldn't post about your conflict on Facebook.
When you're angry, broadcasting your feelings to your friends and family on Facebook and other social networks will more than likely come back to haunt you. "Posting something publicly can't be taken back."
You shouldn't write emails.
The same applies to sending an angry email -- you can't take back a heated rant after you hit the send button. If you can't resist writing down your angry thoughts, jot down your feelings in a Word document. "This way you can't send it hastily and can still safely clear out your feelings."
You shouldn't drink alcohol.
Reaching for a glass of wine to calm yourself down after an angry encounter often does the opposite. "Alcohol makes it more likely you'll act out your anger because it removes impulse control." Alcohol lowers inhibitions by acting on the frontal lobes of the brain, which are responsible for controlling the impulses that prevent us from giving in to urges to harm others or ourselves. "This may lead to more permanent destruction by doing things you'll regret, all from a temporary emotion".
You shouldn't ignore your blood pressure.
The risk of a heart attack and stroke increases in the two hours following angry outbursts, especially among former heart attack patients. Heart attack risk increased nearly five times and stroke risk rose by three times. "If you're prone to high blood pressure, one of the smartest things to do when angry is to check it. Individuals who become angry should know how their blood pressure responds. If it's going up, they need to work diligently to manage their anger with exercise, better sleep, and bio-feedback techniques."
You shouldn't ruminate.
Obsessively thinking about ways the other person harmed you or was unfair to you -- known as rumination -- does not resolve anything. If you find yourself on the receiving end of someone else's anger, you may be able to calm them down by first keeping your own cool. Start out talking to the angry person in a manner that matches his or her level of emotion and then gradually become calmer and steadier as you speak to them. "This leads them to a calmer place".