Dont Go too fast

You never want to put a move on a girl too soon. If you know you like the girl, but don't quite know how she feels about you, get her number, hang around her more, maybe wait a few weeks, monthes if you have to. You will never gain anything by asking out a girl you just met, but you wont find girls running up to you and asking you out just because you are there either. Be availiable.