overcome fear of public speaking

Overcoming fear of public speaking?
I tend to spoil my spoken English before the people of authority. What should I do? Having trouble with my professional growth. I am in the media. I am good in English writing, though. Published articles unpublished books to my credit. Please help. I have this habit of soiling my spoken English to authorized persons. What should I do? It cost me professional growth. I am in the media. I am good in English writing, though. They have published articles not published textbooks to my credit. Please help.
To overcome fears of public speaking is: First, remember that fear is a natural thing. Second, think more positive thoughts. Thirdly, practice makes perfect always things that you should do to improve their ability to speak in public.
Conquer Stage Fright & Fear of Public Speaking, The 1st Step