Always be serious. Don't ever talk more than needed. Sometimes change your personality to distract people who are familiar with you. I'm out...
P.S. Always think about something. If you are not able to do that then just look that you are thinking / having something on your mind.
I'll tell you later
The key is just to not talk much. But, women wouldn't like it if a guy doesn't talk and let them do all the talking.
I love men who are mysterious :P
But you shouldn't change yourself just to attract a woman, just be you :)
Get a hat face it downward hiding your face then get a long black trench coat.
Then take a fog machine wherever you go and a radio playing eerie music and only walk around on nights when the moon is full.