Innoculate yourself against a feared event.
Anticipating a frightening activity?
Feeling a lot of fear?
Preempt the stress.
If, for example, you feel anxiety when speaking in public, address the feeling and change it around. Before speaking in public, go over every part of the experience in your mind.
Imagine what you’ll wear, what the audience will look like, how you’ll present your talk, what the questions will be and how you’ll answer them.
Visualize the experience the way you would have it be.
When the time comes to make the actual presentation, it will be “old hat” and much of your anxiety will have abated.