How about having someone else pay for a direct mailing campaign for your charter yacht? Give your guests free post cards featuring your yacht. Your guests will send the cards to their friends – who are likely to be of the same socio-economic status, and have similar interests as your guests. Not only do you tap in to their personal “mailing list”, but they even pay the postage for your promotion. This is one of the most cost effective promotional tools you can possibly imagine.