My favorite opener : Who lies more.
Its short , sweet , simple , totally unexpected
Stories , well they come from my life experience , like places I've been to , or interesting things that have taken place etc...
Story tellig is an art , you master it , you can keep a chick interested in you.
WC2 has rightly said, there's no set theory or routine . You have to talk , and automatically calibrate and relate the story.