If you own a car, AAA is definately worth the annual fee (around 40 to 55 per year depending upon your state). The first month we had AAA, I had to use a tow truck TWO times! Our van has over 130 thousand miles on it. As for other perk discounts, those can be quiet substantial also. We've used it for hotel rooms, non disney park ticket discounts, etc.
You can go to aaa.com and read about the service etc and actually sign up on line. I think you get a little price break for auto renewal with a cc.
I would say it more than pays for itself but I wouldn't buy it just for possible discounts. it's a good product in and of itself.