You have to rely on your preparation. You got to really be passionate and try to prepare more than anyone else, and put yourself in a position to succeed, and when the moment comes you got to enjoy, relax, breathe and rely on your preparation so that you can perform and not be anxious or filled with doubt.
In almost every profession - whether it's law or journalism, finance or medicine or academia or running a small business - people rely on confidential communications to do their jobs. We count on the space of trust that confidentiality provides. When someone breaches that trust, we are all worse off for it.