9. Come hungry.
Sometimes, when you're trudging around music festival grounds in 90 degree weather, the last thing you want to do is eat a hot meal. At Lollapalooza, that was definitely not the case. While we did eat our fair share of ice cream (Chicago's Original Rainbow Cone was our favorite), we couldn't help but chow down on Chicago-style hot dogs and deep dish pizza all weekend. The best part? The main stages were a mile apart, so we walked it all off. Guilt free!