where oh where?

Alright so here's the situation:
I get to see my girlfriend not very often. And, it isn't very often that we're alone enough to escalate things (we don't have direct sex for various reasons). I would like to find other ways to excite her before we have almost-sex (quite the funny term). So far I know that she is excited when I breathe in her ear, lightly touch the small of her back (right above her butt), and kiss her neck and above her breasts. The breasts themselves, she has informed me, have little to no effect. So, here's the question: based off of the places that DO excite her, what else will likely excite her?
Thanks, hope the vocabulary wasn't too awkward :o

Try going the 'stick your penis in her vagina' route.