There are some caveats
1. Scrub up but don't go metro, you dont want to appear vain or make it look like you put more effort into your appearance than her.
2. In some surveys women always say they men to smell clean (rather than of some kind of aftershave), you don't want to knock her out at five paces or give the impression you are masking BO. Use any scents sparingly. Just have a good shower and wear freshly laundered clothes.
3. While advice from women is good regarding relationships or picking up girls in an innocuous setting you would be hard pressed to find advice on how to be preadatory.
4. Eye contact is crucial but don't stare or look creepy.
5. Be aware of her space but be awre of your own body language, be open and inviting. Don't be cold and unapproachable - never stand there with arms crossed.