How to be professional, Positive And Creative

Being professional is a very important thing that every person is looking for in his own work, and every person is looking for in all of his providers of important things in our life.
But what is professionalism? And how to be professional?
I read many of things about this subject, many definitions, many rules, etc.
But I found out one word that reflects completely professionalism by all means
It is simply just one word….
It is….