Alisin mo lahat ng laman ng interior. Everything in the glovebox, door pockets, anything hanging from the rear view mirror or stuck on the dashboard so you can have a good baseline.
indeed.

improving ride comfort?

check if your shocks are leaking. I woudn't recommend KYB gas shocks replacement. ganyan kasi gamit ko recently, acceptable, but too stiff for "lite" weight vehicles.

kung luma na Tires, palitan mo na. hanap ka comfortable zone-size.