[Jamo]

Several, including some brand specific provided by clubs (Vettes, Audi--really needed since all-wheel drive can be a weird beast). I conduct autocross classes, and went through the SCCA's Safety Steward course to get the Safety Steward license.

That last one was surprizingly good--not so much for actual driving, but for learning about slide angles for out of control cars (a good thing to know when you're placing flagpersons and corner workers on a course). A real eye-opener--cars can do the weirdest things!

Obviously, time spent in open track and even autocrossing simply adds to one's experience.

In my profession, we are obligated to spend a significant amount of time in continuing education--that's how I approach driving the Cobra and driving in general.