Be conscious of your facial expressions when you are on camera. Try to relax. You don't want to keep an unblinking stare or a contorted face because you are too nervous or tense. Amplify your emotions when you're on camera, especially when you are taking up the frame--you need to be interesting and engaging. Big teethy smiles and energetic facial expression can go a long way. Keep in mind that you can also apply your energy to calm and sultry faces too.
