First you have a girl in mind, perhaps she have been your crush since you can remember, or she is a girl you just met but she is shining brighter than everyone else, even in the sea of people you see only her. Here is how to get her.
.communication. Yes, you need to have a very good communication skills, well not like a journalist or a salesman, just enough to speak casually, work up to her, say the first hello, when she replies, comment something about her, something that makes her know you had your eyes on her, something like nice shoes, or comment on what she is doing at that moment or what is happening at the moment.
. Appearance. Yea, people judge with looks, so make sure to appear nice, you don't need to wear costly things jus be neat, this is suppose to be before communication. Appearance include smiles, for they say you are never fully dressed if you don't wear a smile.
.Be Friendly. Yea start up friendly conversation, be it the weather, but watch her reaction if she likes the topic she will easily like to add her own opinion, so remember to make funny jokes so she will laugh, and don't always be the one to talk, hear her out too.
.Friendzone. This a tricky part, since you don't want that, you will have to make her realize that even as are being friendly with her. How would you do that, here is it, drop some pick up lines, "did it hurt when you fell from heaven", "are you go at algebra cause you can replace my X without asking Y", "in keyboard U and I happen to be together". to show your attraction, with that she will have an idea of what you are aiming at
The see another time. Here is when it gets difficult, to know if your first encounter was good, this where you find out. That is if she agrees to see you, but how do you go about it. Here is the tip, as you are about to leave. Tell her you enjoyed your time together and would want to experience such bliss again. Don't say can I have your number, say let me have your number, while the formal sounds like a request the later sounds like a gentle order. If she gives that means, you did good, if she doesn't that's means you did bad.