Compliment right away, NO WAY!.

Gentlemen this is very simple. You see a girl you like and go to talk to her. Don't compliment her right away, maybe even not the first night you meet. If she is hot, she knows it and guys tell her all the time. So be cool calm and collect, tease her.

When she is your girlfriend you will get tons of chances to compliment her. So hold off right away.