#1 Only date women who share your values. That is a fundamental basis for a marriage.
#2. No sex before marriage.(See #1) Sex before marriage short circuits the natural course of the relationship. You also want to show the woman that you are man enough to control yourself. A woman worth marrying will appreciate that.
#3. Don't let love cloud your good sense. Pay attention to how a woman interacts with other people. If she argues constantly with her family, gossips about coworkers, or treats the waiter at the restaurant like a serf, she will not be good wife/mother material. Remember it will largely be her personality which will be imprinted on your kids. Also, bad-mouthing former boyfriends is a bad sign.(She may soon be bad-mouthing YOU to her next boyfriend).
#4. Don't oversell. Don't lead a woman on if you are not truly interested. Be fair.
Those are exactly, almost verbatim, the principles I have for dating. Good to see I'm not totally nuts.