Office etiquette are formal rules of behavior that make professional encounters pleasant and productive. While certain procedures may seem awkward or wasteful to you as you begin working in a new situation, resist the urge to make immediate changes. Discover how things are done and why. Observe how others answer the telephone, dress, decorate desks or office space, snack on the job, circulate memos, etc. Establish in your mind other people's priorities before asserting your own. Any changes you initiate will have more validity after you have familiarized yourself with the customary procedures.
Every Office has its own protocol for who is called by his or her first name and who is called by his or her title. New employees should follow suit, after listening carefully to how people are addressed.
Whatever your position, a "thank you" is in order, no matter how small the task or favor.