How can you be calm?

Come ten minutes early. For any appointment that is of any importance. Punctuality is a habit. Train yourself to adopt the habit. Come early. Sit down. Have a drink. Go through your preparation or do something useful. The impression you make rested and waiting for your appointment is one of reliability, tranquillity, reliability and value. No second chance at a first impression. Get it. Schedule an appointment’s departure time, not the arrival time. Have a bumper period. Allow for travel and delay time. Use the available moments to do tasks that would otherwise require you to sacrifice valuable free time.