#1 Toe links (tune for a balance between stability vs. sharp cornering)
#2 Camber links (tune for even wear across the tread based on your driving style, otherwise you're wasting the part of the tire that never gets worn-down)
#3 Tires (select a tread and compound that gives you the traction you need)
#4 Shocks (tune for a balance between soaking up bumps vs. not bottoming-out; keep in mind that too-stiff front shocks will pre-compress the rear shocks on sharp bumps)
#5 Diffs (tune to get only just enough diffing-out to maintain traction; too little will cause understeer/oversteer, too much will waste power and reduce braking)
#6 Swaybars (use rear swaybar to correct for random wandering when accelerating, use front swaybar to correct for oversteer or excessive leaning in corners)

However, just because these are numbered, you shouldn't stop before you reach the end of the list, even if you think you've solved whatever handling problem you were originally chasing. Every item needs to be optimized.