5) Take control of the details.
This is in line with the point on planning, but make sure you plan those little things that she won't be expecting you to. Those little surprises will make her not even blink twice to go out with you again. Make sure she has a ride home before the subject even comes up at the end of the day. For example, have a cab number on hand or give her a ride yourself. Bring a nice little gift for her that is different than the standard flowers just to show her she is on your mind. It is the gesture, not the amount you spend, that makes the point to her through these details that you are a guy that is different than the rest.