"Nothing in life is more important than the ability to communicate effectively." -- Gerald R. Ford, 38th President of the United States
Nothing could be more true than this quote - especially in sales! Although email prospecting can get you pretty far, at some point you have to pick up the phone or meet that client face-to-face. If you feel uncomfortable with this aspect of sales, then practice, practice, practice! The more comfortable you are, the better your communication.