Whether it’s taking a few deep breaths, doing some light stretching, or having a quick phone call with someone you trust, spending your last few minutes doing something active before a big event will prevent you from spiraling into worry, so you can perform confidently.

... and to the task at hand. 

Mindfulness can help you regain a sense of calm and focus your attention, so you can avoid being caught off guard by your anxiety. You can see it for what it is, and choose to direct your attention elsewhere.