[Siri]

On a less technical note, make sure you order enough (but not too much) food. Concessions is where you should be making a lot of your money, not losing any. I don't have any good advice for predicting the right amount, but I bet others do. I've also seen events open pre-order lunch requests (# pizzas) on the day of the event. Lots of places have bake sales in addition. Some have parents cook at home, so you can get all kinds of cool ethnic foods. Also, particularly for the latter but also in general, know the food handling rules for your locality and venue.

Major bonus points for any place that does IRI corn.