As everyone knows, the longer you wait to book plane tickets, the more expensive they get, so why not use this knowledge to your advantage? Put off booking tickets as long as possible—up until your parents start playing the role of bill collectors and calling you every hour on the hour if possible asking if you've made airline reservations—then when you're a week out from having to head home for Christmas and the only available tickets are for flight getting in at 3 am at an airport five hours from your parent's home with an asking price of $8,000 for coach seats, no one can blame you for not being able to afford the trip! Sure, your folks will think you're a total stoner, but hey, them's the breaks!