1. As soon as you pass the start line, you are only losing time. Minimize how much time you lose. It’s not just going faster, it’s spending less time on the course.
2. The trick is to drive 10/10ths. A novice will drive 7/10ths and then not realize that they went to 13/10ths. Learn the edge and drive it. That may mean some cones get hit and you spin. It’s what teaches you where 10/10ths is.
3. There are fast parts and there are slow parts. Learn the difference.
4. Don’t square off the corners and point and shoot drive. A lot of corners are parts of smooth arcs you can make. It’s faster to drive a smooth arc than a short straight and two jerky turns.
5. Be aggressive in chicanes. Attack them, stay in front of the turns and as straight as you can. Getting "behind" in a chicane is a bad thing.
6. Doing this well means being smooth. Being smooth DOES NOT mean you are slow. To drive the car smoothly may require controlled chaos in the car. Fast hand and foot movements do not mean you are not smooth.
7. Know your line you intend on driving. Understand it. Look for it. If you drive such that you are forcing yourself off that line, you made a mistake and need to slow down. The line is everything, unless you are wrong about where the line is…then you need to change your mind.
8. Look ahead to where you want to exit the turn. Adjust your speed into the corner to make sure your car will be on the right spot when your exit the corner.
9. It’s better to corner under acceleration than braking. Brake earlier and then get on the throttle as quick as you can.
10. The earlier throttle points will be faster. Give up the end of the straight to make your corner exit faster. That speed coming out of the corner will carry thru the whole straight following the corner.
11. Do not try to save runs. If you get screwed up, go off course or mow down cones. This saves tires.
12. Understeer is often caused by going in to a corner too hot. To reduce understeer, straighten out the steering and/or reduce throttle input.
13. A lift or quick stab at the brakes can cause the front of the car to weight and allow better turn in.
14. Alignments are important.
15. If you start going slower or are less succesful than you should be, check the car. Sometimes things change and it’s hard to notice.
16. Seat time is important.
17. Autocross deliberately. Try to drive deliberately. Not just reacting…but control the steering and drive the line. Then do it faster.
18. Don’t worry about long lists of tips. Work on one or two things at a time. Don’t try to adjust everything, put in a new swaybar and struts, try out Hoosiers, and decide to use left foot braking all in one weekend. Make changes one at a time and see how they feel.
19. There are many ways to setup your car and your driving can accommodate them. Spend more time on your driving than your car setup. Human nature is that it’s easier to point to your car, or the classing, or maybe someone else is cheating, or they spent more. But the biggest variable in autocrossing is still always the driver.

- LVSCCA Website

The above is stickied on the Car Setup and Driving Technique section of my local club's forum (http://skism.org/cmc/index.php). Missing from the post is the source: Randy Chase (of ChaseCam fame).

Good nuggets here as well:
http://www.dmvrscca.org/topten.htm

One of those good lists that bare repeating in many forums.

The best advice is find the guy whos been doing it the longest and listen

......and try to get a ride with him.
9/10ths smooth will beat 10/10ths rough everytime

Good post.

Thanks

Too much to absorb in one sitting, but very interesting reading:

http://farnorthracing.com/autocross_secrets.html