One of the most self-serving things you can do is to educate someone else.
In the process of educating someone else, here is what you will achieve for yourself:
1.     You will learn more about the subject matter. As you research and prepare to pass on your knowledge, you will actually update and enhance your knowledge of the topic.
2.     You will improve your self-confidence. Inevitably, you will surprise yourself at how much you already know as you teach someone else.
3.     You will elevate your image as a professional. There is a certain amount of respect and recognition that is given to anyone who teaches us something.
4.     Everyone you teach will either become a client or give you a referral.
Two of the most effective teaching platforms will actually help you to market yourself:
1.     Write a regular column or news letter about your areas of expertise.
2.     Speak to business groups and schools about your areas of expertise.
Both speaking and writing require a great deal of discipline and up-front effort…….. researching, designing, personalizing and creating your material takes more time than actually delivering it. 
But you will never regret the effort. 
As you plan your career path, make room to aggressively seek out writing or speaking platforms to help you grow from helping others grow.
“Good teaching is one-fourth preparation and three-fourths theater”
                                                                                                                   -Gail Godwin-