Chicago knowledge, anyone?

I really want to go to the Blink/FOB/Panic concert in Chicago in August. Problem is, I know absolutely nothing about the city and could really need some inside info. Live in Chicago/know your way around? Please help? Where are good (and cheap) places to stay? How do you get around? Where do you want to go? What so see and so on?

I will seriously love you guys forever if anyone could give me some tips on this.