Also, I'd keep an eyeout for particular sayings and body language, and of she's doing things like searching around for something to look at then perhaps it's s sign up back off.

Other than that all the best advice you could receive had already been listed, well except for being prepared it helps at times by knowing something about the person like musical taste to base a conversation on. Perhaps having a line already prepared instead of having a nervous spastic convulsion in front of said female.