Pre-performance jitters got you shaking in your pointe shoes? Grab a snack! Foods that are rich in carbohydrates, vitamin B or magnesium can help calm your nerves. After a few bites, these types of foods enable your body to produce serotonin, which gives you a calm and relaxed feeling. Carbohydrates like cereal and popcorn, vitamin B-filled bananas and magnesium-packed cucumber and pumpkin seeds will help you fight anxiety—and fit perfectly in your dance bag.