I had a pleasure of working with a few master minds in the line of business specially hospitality and sales ,I always believed to be successful in business more comes with experience on the field and learn from the best then go through theory parts which technically won’t give you the confidence to step up ,I also am a believer of connections and is about who you know not what you know down the line . Having said that to be able to do that you need to gain your confidence and strength and be able to make people to like you first instead of buying from you and that goes all the way in any business.