Everyday Weight Reduction:
15 lbs.-- Swap stock battery for garden tractor battery (stock=30lbs)
5 lbs.-- FMM weight
5 lbs.-- Underdrive Pulley
13 lbs.-- Replace stock DOHC muffler with Supertrapp (except winter, trips)
14 lbs.--Removed cross beam under rear seat (2dr only)
8 lbs.-- Carpet and sound deadener in trunk (main piece=7lbs, rear piece=1lb)
2 lbs.-- Rear Floor Mats
6 lbs.-- Gray rub strips on the sides
5 lbs.-- Rear seat belts
2 lbs.-- Underhood insulation and plastic scoop
1 lb. -- EGR Valve and hardware
1 lb. -- Driving lights and trim piece between headlights (except winter, trips)
11 lb. -- Insulation/sound deadener under carpet and panels
1 lb. -- Black plastic trim under FMM
2.5 lbs. -- Sound Deadener in doors
4 lbs. -- Asphalt based sound deadener under rear seat
2 lbs. -- Cruise Control servo motor, cable, brackets
4.5 lbs.-- Rear 6x9 Speakers
1 lb. -- Dash tweeters
1.5 lb. -- Glove box door weight.
2 lbs.-- Steel plate w/foam below steering wheel
4.5 lbs. -- Remove one radiator fan (driver's side)
2 lbs. -- Sound deadener under console
1 lb. -- Metal plate/bracket under console bin
2 lbs. -- Steering Wheel weight
1.5 lbs. -- Replace passenger outside mirror with blank bezel

Autocross Weight Reduction:

25 lbs.-- Spare Tire
5 lbs.-- Cut off back 1/2 of exhaust, exits out side
5 lbs.-- Corbeau Forza drivers seat
34 lbs.-- Rear seat (bottom=9 lbs, back=25 lbs)
6 lbs.-- Jack and hardware
4 lbs.-- Spare tire cover
1 lb. -- Ash tray and bracket
3 lbs.-- Visors
4 lbs.-- Front Floor Mats
4 lbs.-- Stereo
35 lbs.-- Passenger Seat

Future Possible Weight Reduction:

10 lbs.-- Remove all or most asphalt based sound deadener on floor
6 lbs.-- Dash Cover
13 lbs.-- Door Panels
5 lbs. -- Console (deluxe with armrest)
40 lbs. -- Remove AC

-replace stock wheels with lighter ones
-replace stock hood with fiberglass or carbon fiber one
-replace stock fenders with fiberglass ones
-replace stock front seats with lightweight racing seats
-remove all luxuries(power windows, cruise control, etc)
-remove metal bumper supports and foam
-cut air path into rear bumper
-remove door panels and plastic interior panels
-remove headliner, sun visors, dome light and wiring
-remove rear view mirror
-remove door mirrors
-remove metal plate under steering column
-remove rear seatbelts and retractors
-replace front seatbelts and retractors with 5 point harnesses
-remove metal bracket holding rear retractors
-remove throttle linkage plastic cover
-remove trunk release cable and handle
-remove trunk lock assembly
-remove hood release and latch mechanism, replace with hood pins
-remove hood and trunk hinges, pin them on
-remove third brake light
-remove front turn signals
-remove plastic grill
-remove underhood weatherstripping
-remove trunk weatherstripping
-replace steering wheel with aftermarket one, remove airbag, clockspring, counterweight and wiring
-Grind metal inside steering column smooth with dremel
-remove passenger airbag, replace with cover from blown airbag
-remove airbag computer and mounting plate
-remove entire air conditioning system, including wiring, hoses, brackets, clips, pump, condensor, etc.
-remove entire heating system as well as front defroster
-replace rear defrost window with no rear defrost window
-replace power steering with manual steering
-replace stock radiator overflow bottle with smaller plastic bottle
-cut stock shifter to shorter height
-remove all excess fuses and relays
-remove all excess nuts, screws, bolts, washers, clips, and snaps
-remove windsheild wiper fluid holder
-remove wipers, motor, wiring, hood squirters and hoses
-remove plastic spring wraps(the things that keep springs from clanking)
-remove emblems, racing stripes, and hood badge
-replace stock brake rotors with slotted brake rotors
-drill holes in metal inside door panels and package tray(or cut them out altogether)
-drill holes in battery tray
-remove fuel tank and associate components, replace with fuel cell
-replace controls arms with lighter ones
-replace rear disk brakes with rear drums
-scrape undercoating from entire unibody, spray paint flat black to prevent rust
-engine lightening, inlcuding cam gears, valvetrain, pistons, rods, crank, flywheel, etc
-remove entire dash, and all wiring, etc. Replace with aluminum sheeting and autometer ultra lite gauges
-replace all bolts and nuts with lighter titanium or aluminum ones
-replace side and rear glass with Lexan.
-Remove shift boot
-Replace shiftknob with smaller one
-Remove center console and weight underneath
-Remove Trunk Vents
-Remove mudflaps
-Remove Evap Purge System
-Remove Tranny Counterbalance weight
-Remove Front Sway Bar
-Remove Fog Lights and wiring
-Port/Polish inside/outside of Intake manifold (DOHC)
-Remove heatshields

Thanks to all who i aquired this info from, as i cannot remember your names.