Aim low, or you'll be too good for anyone. As long as she has had a wash, doesn't have any diseases and isn't going to walk all over you and treat you bad, you can start there and go upwards.
Fuck that, be arrogant and charming, see a hot girl and hit on her, compliment her shoes or her earrings, improvise from there.
If she turns you down, find another hot girl, repeat.