You are the best Sales Person available on this Earth . This is what you have to Affirm about yourself day in and day out. Talk positive , think positive about yourself to yourself everyday in the morning and before sleeping. You know yourself the best so make customised affirmations about yourself relating to your life and come out of all tye negative thoughts. Dont think about instant results but slowly and gradually you will be out of your comfort zone and start speaking to someone whose name is Mr SUCCESS.