Dress for success. Wear something that is appropriate for your body type and reflects your style. You don't want to look like you're 20 again, but don't be afraid to accent your best assets.
Listen more than you speak. You will learn a lot about the character of your date, and if you're meeting for drinks, limit yourself to two drinks because overindulgence can really spoil a date.
Be your authentic, brilliant self. It's not a time to play games or be mysterious. There's a lot of dating myths out there to be mysterious and play these cat-mouse games, but it's really just a waste of your time as well as his. Just know that you're going to meet a lot of people before you meet the right one, and it should be fun. You should relax, enjoy the event and just have fun with it.
You should feel confident in yourself and know that you are desirable. You have a lot to offer, and whoever catches you is going to be one lucky guy.