Weight reduction

What are some ways to do weight reduction without really affecting the way your car looks besides doing the basics. like these:

Removing spare tire and jack
p/s
a/c
rearseats
light wheels

maybe speakers even though only a couple pounds and what about going down to a civic half size radiator does that save much weight.

brake dust shields and exhaust heat shield, under the carpet tar front and back. this will remove possibly 10 lbs,

odyssey pc battery

in-dash blower

jdm front and rear bumper support

manual seat belts, or switch to a 4 pt harness, which i however do not reccomend unless you have a roll cage