The most important thing you need to do before you start making adjustments is make a base. After you find a good base feel what you don't like and just try something that seems like it would fix it... if it doesn't than put the adustment back to base and try something else or maybe just going in the opposite direction of the same adjustment (of course get your ideas on what to change by asking on here or looking on that site posted before). You can ask around for a good base setup on here I'm sure someone will have one.

Driving style is extremly important. You need to feel comfortable with the buggy you drive. I personally like it being very loose with lots of steering but theres a few people at the local track who just can't drive it unless the buggy is setup tight and under steers. Just experiment with things even study how it works on your work bench one night and it will really help you learn exactly how the buggy will react to certain adjustments... experience is the only real way to learn how to setup a buggy to fit you personally.

What buggy are you driving? Also when you give track conditions we need type of dirt (clay/sand/top soil/grass), is it loose or packed (and how loose or packed it is). Bumps and jumps is only a small part of track conditions and its one of the least to worry about because you can only do so much with how the buggy handles it. If you have a very bumpy track through you normally want a fairly light shock oil... something like 40 front and 35 rear and a medium/soft spring. Heavier springs and shock oil will make the buggy more stable on smooth tracks but on rough tracks they make the buggy more unstable... and its the opposite for light springs and oil (unstable on smooth track and more stable on rough tracks).

Oh yeah and here is the order of importance in your setup... 1st of course the thing that will make the biggest difference when changed and the last being the least difference in handling when changed. This will help because if its only a minor adjustment its not something you would change diff oil to fix and it just seemed to be a good order to go in when you setup your buggy (when you first setup your buggy that is... like diff oil can usually be left after you set it where you want it)... it worked well for me.
1- Tires
2- Diff oil
3- Alignment... Camber, Caster, and Toe. If you have your toe adjustments off the buggy will wonder all over the place and if the camber is off you wont have a good tire contact giving you no grip and faster tire wear on the side that is contacting the ground. Also caster will make a fairly large difference in how aggressive the buggy handles.
4- Shock oil/springs
5- Shock position
6- Sway bar/anti-squat
7- Roll center
8- Wing... Yes if your going 25+ mph you can feel the wing start to take a small effect and the faster you go the bigger the effect is.

You do have the ride hight adjustment too with the set screw on the suspension arms... but you don't really want to lower the ride hight anymore unless you're on a really smooth track. If you are going to use the adjustment it will make a big differece... I would put it after shock oil/springs.