Your question is too broad-based. Remember we are not privy to your sexual repertoire, sexual desires, sexual expertise, past sexual experiences, etc. Therefore, there is no true answer at this time until you supply some detailed info. May I suggest you read many threads on pleasing her etc. Look at erotica, g-spot stim, positions, romance, etc.

You could always do the Shocker
LOL
So bad!
Who comes up w/ this stuff?!?..and then also gives it a name... lol

Yeah the shocker will definitely surprise her! I like the other names it's known as "two in the koot, one in the boot" or "two in the grass one in the ass", that is just too funny!

All jokes aside Matt_man there are plenty of things you can do to her but only you know what you've done and what she is comfortable with. Just think of something that she may have brought up before that you've never had a chance to try or explore properly. Good luck!

Read the post on Body Worship and then do it!
Learn where the posterior fornix is and learn how to caress it.

Knowing those two techniques alone will turn you from an average lover into a spectacular lover. Which, based upon my experience, would be shocking!