I go for a walk in nature with my husband and dog.
I journal to vent it out, or I talk to someone who will listen without judgement.
Take a herbal bath by candle light and try to let it go.
Eat some 90% dark chocolate and take deep breaths, or have a glass of red wine while listening to some suitable mood music.
Anything that is good and helpful for my mind, body and spirit to help defuse the upset feelings.

Also, getting on the treadmill, or going outside for a good long run is a great way to get rid of A LOT of negative steam.