RiskTrump hit the nail on the head....get her opinion on something....ANYTHING. Chicks LOVE to give their opinion. Typically I read current magazines to work a set with the "what do you think about" ploy
for example....go to cosmopolitan
www.cosmopolitan.com
Chicks read this all day and night....if that is TOO sexual for her...go to the most recent edition of PEOPLE magazine....
There will ALWAYS be something to talk about..
eg...do you think Ashton Kutcher REALLY cheated on Demi Moore or was it a ploy to get publicity for 2 1/2 men? You can take this conversation in a number of directions...cheating (who cheats more women or men? can you tell when a guy is cheating? when a girl is cheating?) Is age difference important (he is 13 yrs younger than her)...etc etc etc
Remember the more you read about things chicks care about...the more interesting you are (SO FORGET ABOUT THE NEW RELEASE OF MINECRAFT)
Good luck!