Learn to control your breathing.

When people get nervous, it's very common for their breathing and heart rate to increase. Consider trying this breathing exercise:

• Find a comfortable chair to sit in. With your shoulders relaxed and your back straight, place one hand on your stomach and the other on your chest.
  
  
• Take a slow, deep breath in through your nose and hold it for several seconds. When you breathe deeply the hand on your chest will move very little, while the hand on your stomach rises.
  
  
• Exhale slowly, letting the breath out of your mouth and pushing out as much air as you can.
  
  
• Repeat this process until your heart rate drops and feelings of nervousness subside.