You know how people who are afraid of spiders can go to the zoo and hold a tarantula or if they are scared of flying they can go on a workshop that includes going up on a flight that just takes off and lands? I took a night class on teaching which forced me to stand up and speak :)

A lot of people recommend speaking and networking groups, there is one called toastmasters, but really it just comes down to "feel the fear and do it anyway".

Perhaps I should write an article about this :D