It calms you down nicely and makes your body
tired and prepared for rest.
Take good care of your appearance
in general. Look as good as you can every day! Wear clothes that are comfortable and that look well on you, especially you're going out. Eventually
this outward confidence will soak into your mind and you will start to feel better too.
As I've said, one of the many ways to get out of anxiety is to train your concentration.