How to make car lighter?

It all depends on how far you want to go. Fiberglass hood, hatch, even doors. Remove a/c, remove smog pump. Take out rear capet and all sound deadening. Take out spare and jack, take out any unesessary interior pieces. Remove front sway bar, aluminum heads, aluminum driveshaft. Theres plenty you can do you just have to decide what you want to give up.
 
cut bigass holes in the body panels/fenders/doors/quarters. In fact, just take the fenders/doors/bumpers/windows/hood and all that useless junk off...it's just unnecessary weight.
 
All the things I have done. My lx hatch ways 3000 with me in it
(Weight Removal)
Ac system,power steering,air pump
front sway bar,radio or speakers,W/S/washer and pump,inner fender liners,fiberglass hood,sun visors, Aluminum Heads,cruise control,dog bone from rear,passanger seat front and rear seats. take spare tire & jack out at the track, No sound deading in the whole car went through every panel including the headliner,carpet,went to aluminum drive shaft,Aluminum skinnies. Flaming River Manual rack
 
Remove the axle damper weight, put in aluminum bumpers, remove all the sound deadening under the carpet, remove all the exhaust except the mufflers, use lightweight seats, remove the sound system. Go to manual steering and brakes, and use an aluminum master cylinder. Get aluminum rear control arms. Remove the front sway bar. And then take the hole saw to the body, such as the hatch bracing, hood braces, etc.

For the extremists out there, go around the car and cut off any bolt that extends more than one thread past the nut.
 
dont forget the door glass and other junk in the door, any unused seats carpet, dash (just get an oil press, tach water temp guages) along with all the other astuff and you will be under 3000. chris