Equality.
“I am professional! I don't need you to tell me what to do.” If you are in a state of saying this, it could be the beginning of your fall.
LISTEN [everyone]
OBSERVE [details]
THINK [creatively]
Stay humble and listen to everyone. Because no matter the position, each opinion enrich your perspective. Watch your surrounding. Observe it and extract every detail you can. Because you won't ever experience the same moment twice. Think about your work. Don't lose your creativity. Using the same [working] pattern for different clients sucks.
To be a professional means speaking politely, having expensive clothes, knowing every cocktail recipe, having high prices asking the right questions.
Your ability to be professional is essentially the result of your approach towards your work and your life. This self-installed programming becomes the cornerstone of how you can move forward in your career and build not only a name which speaks for itself, but also predetermines the success of any brand or project that you decide to pursue.
More about professionalism can be found in my book.