Good post. I've always found that simply paying attention to her body while you're down there will tell you everything you need to know. Pay close attention to breathing, grinding, etc. and you'll soon know what she likes and does not. Don't forget that not all women are the same. And be sure to communicate, even if it is only through grunts and moans, as those can be just as effective a method of communication.
Now everyone go out there and show 'em what you've learned!