Be yourself. If it goes well then it went well because you were you. Do not pretend to be anything you're not because if you do and the date goes well you will have to keep pretending. Do not take your blind date to places you would normally not go such as an expensive dinner or some exotic place. Do not spend a lot of money on a blind date. Don't do anything you're not willing to do on a regular basis.
The bottom line.....don't try to impress your date. If the date works out and a relationship grows from it then you can start impressing her - or - him.