It's really not that challenging and there are no rules. If you like the girl and the first date is going well, ask her if you can see her again (while you are on the date). Don't make her wait, don't play games. If you want a girl and you're sincere about wanting to get to know here, there isn't a point to game playing, or following rules to not seem "desperate".
Just remember to treat her how you want to be treated. If you want her to screw with your head, then by all means, screw with hers, make her wait. If you want honesty and transparency and an adult relationship, then act like an adult and treat her with some respect, dignity, and honest communication.
The first date will set the precedence for the rest of the relationship.