Heh, now you know I've been waiting for a thread like this. First thing I have to ask is how old is this guy who is asking about girls?
I mean, well, what do you want to know? I mean a girl is a very complex being.
If you're looking for sex, good luck and good riddens. That's what you have a hand for.

So if you're looking for a quick way to get her in bed, you're not going to find the answer here. I will NEVER help a guy bag a girl just to do it.
If you want to get in good with a girl, respect her. Listen to her, talk to her, be cute with her - IF YOU HAVE TO DO IT IN PRIVATE SOBEIT AS LONG AS YOU DO IT. You can be Mr. Macho with your friends, and we'll even play along for the most part, but when the day is over, and you go home with your girl, you're going to have to be the cute you that she likes.
Presents are nice, and well accepted. They don't have to be expensive. They can be very inexpensive, even free... a flower picked from a garden, a picture... if you're an artist, making a gift is DEFINITELY from the heart.
What else do you want to know... the question was really vague, so I did what I could with the type of question given.
*the woman hath spoken*
mhmm... kthx!!