Don't be "nice"
I had been set up on a blind date by a woman I had been casually sleeping with. She had a colleague at work that was single and looking. Her advice was to me was "just be yourself and it should go great". It didn't go as well as I was hoping and then next time I saw the woman who set me up she said "Wow you sure screwed that one up. She told me that you were very nice but not what she was looking for right now. What the hell?" I gave her a puzzled look and she replied "You aren't nice. You're polite. There's a huge difference. I told you to be yourself and it sounds like you weren't. Had you been yourself, you wouldn't have spent more than 30 minutes in the restaurant.