Read all the books you can get your hands on about advertising, marketing, selling skills and copywriting. There are lots to choose from. The authors on my shelves include: Drayton Bird, Robert Bly, James Borg, John Caples, Robert Cialdini, John Fraser-Robinson, Claude Hopkins, Graeme McCorkell, David Ogilvy, Victor Schwab, Joseph Sugarman, Nick Usborne, Joe Vitale and Walter Weintz.