1.Even five minutes of lateness is inexcusable on the first date. People are already anxious on these excursions, so making someone wait and think more about everything is pretty rude. Seems like the trend is to be late for things regularly. On one date, I texted the girl and told her I was running late. She said she was too. We ended up just having the date ½ hour later than planned and technically no one was late because we were both ½ hour late together.

2. Having a Wardrobe Malfunction
Make sure you cater what you wear to what you're doing. I try not to make a girl walk too much if she's in heels. Also, I've seen girls wear pearls and a nice blouse to trashy outdoor drinking events, or heels to sporting events.

3. Talking Politics or Religion
Staying away from debatable content is a good idea the first time out. It's fun to argue with your significant other, but I think it's important to reach a comfort level first. If you try to proselytize someone, or battle them over a hot topic like abortion, you may reach a point of no return.

read more here: http://tundebadmuss..com/2013/09/10-common-first-date-mistakes.html