A good friend of mine has a mantra to deal with things which are beyond our control.
"Let it be" he says.
He offers no advice,he does not attempt to give suggestions and he does not even pass judgements about whether one is doing the right thing or whether something else ought to have been done. He does not sympathise and does not say "Life is unfair" or that the other person was wrong or that it is a bummer.
He listens patiently instead and he just says, "Let it be."
And you know what? Surprisingly it works.
The next time, things go wrong, do not send out negativity into the universe.
Just let it be.
Breathe deeply. Relax. Drink a glass of water (or hot chocolate).Go to a place which fills you with peace and comfort.Call a friend who exudes positivity.
But mostly, Just let it be.