This will always be a popular discussion and for everyone’s car there’s something different you can do to balance and/or reduce weight. It all depends on your vision for your car to go extreme “race car” or keep it as stock as possible.
First and foremost: ourselves, you should always focus on your health. As you get older this is even more of a reason to focus and can help overall.
Rotational mass - wheels (lightweight Drag wheels), brakes, Rotors, hubs
Seats - lightweight seats & rear seat deletes
Steering wheel & Column
Battery relocation & lightweight
Removing stock parts for aftermarket - Headers, intake, exhaust, flywheel, driveshaft, body panels
Windshield wiper fluid reservoir
At your own risk - front sway bar, bumper crash bars, Airbags, and when you start cutting. Add more below⬇️