It's really not easy these days, here's one technique that helps me calm down, it's from Carlos Castaneda book:

I got up and went to look for don Juan. I found him dozing in a chair. The moment I
approached him he was wide-awake. I said good morning.
"You seem to be having no trouble falling asleep," I commented.
"When you have been afraid or upset, don't lie down to sleep," he said without looking at me.
"Sleep sitting up on a soft chair as I'm doing."
He had suggested once that if I wanted to give my body healing rest I should take long naps,
lying on my stomach with my face turned to the left and my feet over the foot of the bed. In order
to avoid being cold, he recommended I put a soft pillow over my shoulders, away from my neck,
and wear heavy socks, or just leave my shoes on.
When I first heard his suggestion, I thought he was being funny, but later changed my mind.
Sleeping in that position helped me rest extraordinarily well. When I commented on the
surprising results, he advised that I follow his suggestions to the letter without bothering to
believe or disbelieve him.