For street use and high speed stability, you want a little toe-in on the front wheels (10-15 min.), lots of caster (6+ degrees), and not much negative camber (0-.5 deg.). For track work, you want crisper turn-in and better cornering, so a little toe-out in the front, less caster, and more camber (1.5-3 deg., depending on tires) works better, but makes the car more darty at high speeds. It's all a compromise, according to how you will use the car. Keep the rear toed-in slightly (10-15 min.) in either case.

If you have lowered the car a lot, you need to put spacers on the steering rack to prevent bump steer.

HTH,
TT