I was at a networking meeting and a member was going to give a presentation. She said she was very nervous about speaking. I told her to "Take a Breath", then went on to teach her a simple breathing technique. Sit up straight in your chair without your back touching the chair. Close your eyes. Focus on your breathing. Inhale thru your nose for the count of 4. Hold your breath for the count of 7. Exhale through your mouth for the count of 8. Repeat three times. This technique has been used by Dr. Andrew Weil very successfully to relax people. Try it.