Darren's got the right idea. You will be amazed in the change in the feel of your car from just changing the Bushes on your current swaybars. Obviously going to something like a Whiteline 22-26mm adjustable sway bar will change this even further. But start small, see if you can get satisfaction out of even the smallest modifications.

Suspension mods such as coil overs or even just a good set of shocks and springs are always going to help as well!

-Pauly