Author's note: This special edition of Shut Up and Sell More Weddings & Events is for DJs, entertainers, lighting and photo booth companies. If you've already read the original edition, most of this is going to be the same for you. I've updated and changed the references to be specifically applicable to disc jockeys, lighting and photo booth companies. It will certainly be a good refresher for you, I just want to be transparent. If you've not read...