Learn how to cook meals fancier than Kraft Dinner - that goes for guys and girls. Practise budgeting with the money you have now. In short, master important life skills. As to the social, it is said that a man will treat his wife the way he treats his mother. If this is true, then I suspect it works the same way for daughters and fathers.
Marriage is about love and major self-sacrifice.
It means making dinner when you know your spouse is more exhausted than you. It means getting up with a sick child at 4 a.m. because your wife or husband needs to sleep more than you do. We singles cannot think we will instantly turn into loving, respectful, giving people the moment we say our vows. Yes, one receives graces in marriage, but overall it's a slow transformation that is best started long before the wedding. Find a place to volunteer.