Depending on how hardcore you want to go...
Remove rear seats
Remove passenger seat (not sure about the airbag business tho)
Remove spare tyre DO THIS
Remove jacks/tools DO THIS
Remove spoilers TO LAZY AND JUST HAD SEAL REPLACED UNDER WARRANTY
Nearly empty tank BIT UNDER 1/4 EVERY TIME
Light weight rims ARE ON THE LIST WHEN GET SOME MORE MONEY
Anything from the interior STICK TO SEATS I THINK. DON"T WANT TO GAIN RATTLES
Speakers THEY WORK AT THE MOMENT DON'T WANT TO CHANGE THAT
Basically anything that isn't needed and weighs something.
Also have a pre-game dump before going to the drags
IF NATURE IS CALLING
Usually save the hot dog and drink till the end of the night to.
P.S. I'm not really serious but it would be nice