You sit down to start writing your wedding guest list. Then it gets longer. And longer. And pretty soon you've got a list of 300 names and a venue that can only seat 100. Cutting down the guest list is one of the most stressful, and confusing, aspects of wedding planning. You don't want to hurt anybody's feelings, but you really can't afford to buy dinner for every person you know. So it's time to start dicing up the list. But where do you start? And how do you decide who gets a plus one and who has to fly solo?