To date, the first thing is to not ‘act’ and just be who you are. 

The initial stages are just fun. Enjoy it. If you think it might be good to be serious that's when you have to be careful. 

First, do you like her mother? She will become her mother as she gets older. What is her history? Don't get serious if she's ever been a skit or had issues with the law. 

Don't get serious if they have kids. It causes many problems when you have to raise kids with someone else rules. 

Use common sense. Don't do anything you feel uncomfortable with. Remember you are the man and she is the woman, not the other way around. 

 * slut, not skit