Here is a list of stuff I removed.
Removed AC compressor, compressor brackets, all AC hardlines in the engine bay. It took maybe and hour or so. The compressor comes off pretty easy and the the bracket is held on by 4 bolts I believe. The hardlines are a little harder to unbolt from each other but you can always cut them and then remove them. Just make sure your AC is empty before you do.
Remove the washer fluid resevoir and all it's components if you don't use it. It's a few bolts and hoses.
Remove the cruise control mechanism if you have it.
Remove the foam padding behind your front bumper. I just stuck my hand in front of the radiator and broke the foam into smaller pieces so I could pull them out.
Pull up the carpet on the rear deck, it's just attatched with plastic clips. Remove all the crap under that. You can do the same to the padding under the carpet behind the seats. Just lean the seats forward, unclip, and remove the square pads. They are glued to the wall but come off pretty easy.
Take off your front bumper and remove the big plastic piece that sits behind there. I just have the main steel brace behind my front bumper. You should be able to do the same with the back.
Removed my fender linings. Be sure to secure the the wiring looms that run under the fender to the frame underneath. If not your tires will shread them when you drive.
Change you steering wheel to an aftermarket one. The airbag and stock wheel are pretty heavy.
Change your seats to lighter ones. The stock seats are fairly heavy. I had the ones with speakers in the head rests.
Changing your headlights is optional. I shaved about 15 lbs changing mine the CF flush mounts.
CF mirrors will save a couple pounds if you want to go that far.
Switch your stock airbox to a cone filter. You can buy an adapter at Autozone or Pepboys and then slap any cone filter you like on it.
Change the crappy stock exhaust and headers. They way alot and have crappy flow.
High Flow cat or test pipe in place of the stock one.
______________________________
Other things you can remove.
The metal shield in your trunk blocking the fuel lines to your gas tank.
Your spare tire and jack. My spare weighs probably about 20 lbs. I used to leave my spare out all the time but now I only take it out when I'm autocrossing.
Pull all the carpet in the trunk.
And nothing beats being as light as you can be. The driver losing weight is just as good.
_______________________________
Most of how to remove this stuff you can find in a manual. Just pick up a good one and read through it before you remove things. Saves you some hastle if you plan on putting stuff back in ever.