Include rehearsal dinner, welcome cocktails, day-after brunch, any excursions or activities you are paying for, etc.
It seems there was a lot of confusion over at the "How much do you think your destination wedding will cost?" thread about what costs to include or not include, and someone suggested breaking down costs by categories, which I think is a great idea. Site administrators, I hope I'm not stepping on any toes! Don't mean to, just seemed like people were confused.