lol you got reemed!
Some quick tips:
1. get a high pressure washer and blast your car rather thoroughly before going to the pits
2. shouldn't get done for stupid things like brake lights etc, check all fuses and globes before going
Basically they are going to check EVERY stupid little thing (lights, washers, windows go up/down etc etc) before they move on to the big stuff.
What pits did you go to?