There's a ton of handling threads here-definitely read up..
Summary:
1. Try to load as much weight low and forward as possible
2. In the handling threads you'll find reference to Michelin tire inflation chart which is based on weight at the wheels. Weigh the vehicle and follow the recommendation. Particularly in regard to front tires. You don't want them to be overinflated.
3. Wheel alignment with emphasis on max positive caster. You'll see that in the threads.
4. I found the heavier sway bars and track bar to be beneficial, but you want to do that last after trying all the cheaper ideas.
5. After all is done, come to an acceptance of the handling. It aint no sports car or even close. Slow down, enjoy the ride, drive in the vehicle's comfort zone. You will not be able to keep up with auto traffic on winding roads, accept it and let them pass.