Speaking from personal experience,these are my 50 cents on how to minimize fear and anxiety when speaking publicly : Just try to concentrate on WHAT are you speaking about,not HOW you're doing it.Of course,to do that you need to be well prepared and it also helps a lot if you think before a talk about why is it's object important and must be intresting for your listeners.
Ultimately,when speaking publicly,you're conveying an imformation,not yourself.I think you should only worry about whether your persona distracts listeners from your talk or not.
Can't say I don't fear public speaking at all,but these things certainly help me when it comes to it.