You'll learn more, and more quickly, than you would imagine. Read material directly relevant to your career to become expert in the practice of your profession, but also read broadly outside your career field to stretch your thought boundaries. In all reading, seek to understand concepts and their applicability to today's encountered challenges. Reading brings knowledge, and knowledge is power. Learn to control your emotions.
Unbridled emotions override the sound judgment and reasoning required to succeed in advertising.
Attempt to detach your emotions from business issues so that objectivity prevails. Treat all people to equally generous portions of civility. If you treat others well, for the most part they will treat you well. What you transmit, you receive. Act with appropriate decorum and business etiquette.