Answer:
By writing interesting articles using the scientif method related to my area of expertise.
Explanation:
In order to have a professional growth in certain area, even for promotions in some jobs, the person needs to have certain number of articles published. This articles have to be, of course, written using the scientific method.
This shows that the person is contributing to his community by discovering something, making research in some topic of its expertise, or even making conscience in the population.
In this case (medical field) I can become a better medical professional when I write articles about diseases, making experiments of some drugs to cure people, giving the world a cure of some disease.