Stop
Turn off all sounds
Close your eyes
Slow your breathing
Focus on every breath you take
Let your heart slow down
Don't stop until you can feel your heart beat
Open your eyes
Now that you've discovered the art of calming down, take a look at your situation. There are things that are going well and things that aren't. There are things that you can control and things that you can't. It's really easy to discern the difference between the first pair. The second, often times, is blurred.