Do not look at her breasts, the moment you will everything is lost.
Look at your best. Smell great. And keep in mind that she likes sex as much as you do so don't be afraid to go kino. Challenge her and make her to take the cube or at least 5 lies game and score from her a drink.
Take a look at this video, i found it quite useful.
http://www.youtube.com/watch?v=V3Z4Nq0OrrM
Maker her senses to go nuts:
1. visual - great outfit, great haircut... make yourself to look as good as possible
2. hearing - calibrate your voice. Speak loud and clear. Whisper something in her ear, that's a very nice feeling for you ear and it's also kind of a flirt
3. smelling - you MUST smell nice!!! Shower, pick a nice parfume and fresh new clothes
4. feeling/touching - she may touch that means you must be trimmed and that takes me to visual all over again
5. tasting - your mouth shouldn't smell in case she may be kissing you so take good care of that. Clean your teeth and your tongue.
I'm sure you know all of this but watch the video, maybe it will help you.