This is actually a really good question that I'm not sure how to answer because most of the things I would do may not be the best. The things that cause me the most anxiety are things dealing with people and feeling like they hate me for being too quiet and weird. It's odd because dealing with people causes me the most anxiety so I retreat and avoid all human contact. Something like a five mile bike ride or a long solitary walk in the woods. I used to have some good friends, who would make me laugh about the situation, but not now, I've lost most of them.
I remember to breathe and tell myself over and over, "you're ok." Sometimes I yell back, "I'm not ok!" but just opening that dialogue with myself helps.
The Hokey Pokey IS what it's all about