Progress rear sway bar, whiteline front sway bar, lowering springs on Tokico blue HPs or KYB GR2s, or coilovers, and energy suspension polyurethane suspension bushings are your options.
Ultra Racing or someone makes other stabilizer bars.
"If you don't love me at my diddliest, you don't deserve me at my doodliest." - User ktluvscricket of reddit
I've got the Eibach pro-kit springs on Monroe shocks. It handles so much better than the stock springs. If you can only afford one thing springs is your best bet to start!