Its a trial by fire.  I refused to speak on the phone because I blocked so hard until I did it ans stuttered through it every time no matter what.  Then it all but went away.  I was scared out of my mind to knock on clients doors but I did it, stuttered through it, still kept my composure and maintained my kindness, now its all but gone, I would say the very last thing in my mind but that's not true, its not even something I think about anymore.  But you know the great irony, my Co workers who I helped train to sell also, and the one who trained me, they all said when they would go up to the door for their first clients, they felt like their hearts were going to pop out of their chests they were so scared.  And they are fluent..