Soothing touch techniques. One is called "Havening."
The basic idea is to put your hands on opposite shoulders, and then rub down the backs of your arms to your elbows. Then lift the hands and replace them on your opposite shoulders, and rub down to the elbows again. Repeat over and over.
While doing this, you can repeat a mantra in your mind that you want to believe. “I am safe. I am powerful. I am infinite.” Anything that you want to believe. There are more complex techniques that work even better, but this is a really good start and super easy to do.
Dave Wolovsky, MS CAPP
Relationships Coach, answering the internet's questions about all kinds of relationships.