Allow your anxiety level to increase. Feel your heart and breathing speed up. The adrenaline is your body's natural drug that, in moderation, makes you sharp, creative, and quick. It brings the feeling of excitement and exhilaration that comes from trying something new. Recognize that it also can be scary and stressful.
Some stress is useful, for it provides energy.
Too much stress can lead to burnout. Because that's where growth takes place. Just like a muscle gets stronger when we exercise it outside its normal range of use, we get stronger when we get out of our rut. And just like our muscles, once we stretch beyond our current capabilities, we don't ever go back to our original dimensions. As we try new things, we gain confidence.