7. Party T-shirt
I was the only one last year that didn't have a dubstep/rage/party/drugs themed T-shirt on at some point. This one was my favorite.
Because the music doesn't ever stop. At some point you are going to have to get some sleep. Even when you walk into the cabin room, your TV's blasting electro fist pumpers. Give your ears a break.
5. A Book
Trust me, after some of the things you'll witness on this thing, you're definitely going to want to sit down, drink some tea, and read a book when no one is looking.