If you know this girl does not already have a boyfriend and is interested in dating, find out what she likes. Like the ballet,opera,classical music/concerts etc. find out if there are any of these things happening in the near future and ask her if she would like to go. After a few dates you will find out if you two hit it off or not. Then ask her if she is interested in becoming an item. Just my suggestion.
it depends how old you are Sometimes. maybe you should try to do something manly. but first you have to do some manly things first. Just so easy as like opening the door, if she's cold, over your jacket.
Well I am a girl and girls love poems it seems kind of weird but it seems like no matter what personality she has she would most likely enjoy a sweet writing/poem written from your heart. Then just gain the courage to ask her out to a movie or something
take her someplace that she likes, ask her plenty of questions to seem interest, crack jokes, be cute, be slightly affectionate at first (as in give her a hug and a kiss on the cheek when you pick her up), after you got her hooked, ask her if she's dating anyone, then let things evolve from there