1. Plan it!
One thing that men hate is when women can't decide where to eat. Women hate that too. If you ask her out on a date then you should have an answer for where and when the date will be. Try and pick a place that is comfortable and allows you to conversate easily. Movie dates, for example are not a great idea for a first date because you both will be staring at the screen and not able to have a conversation to get to know each other. Mini golf is always a great first date idea.
2. Offer To Pay
Even if she offers to pay you should insist on paying - especially if you initiated the date. If you continue dating you can figure how to split bills later, but initially you should offer to pay.
3. Be Confident
Confidence is sexy. She already said yes, which means there is a level of interest in you too.
4. Dress To Impress
We aren't saying that you should feel obligated to wear a suit and tie to your local pub but it wouldn't hurt to brush your teeth and at least make an attempt to look more presentable. Maybe put on a shirt that doesn't look like you slept in it.
5. Be On Time
You should always be on time, but also be gracious if she is fashionably late
6. Be Attentive
Show her that you are genuinely interested in what she has to say. Ask follow-up questions about her. Women can tell your level of interest by how much you engage with them. It's not all about how awesome you think you are, turns out.