Here's a suggestion. Don't get married until you've gotten tired of dating. If you are not tired of picking strangers up at bars late at night, you do not need to be thinking about getting married.
With longer life spans, you can have kids when you are in your 30's or later and still live to see grandkids. If you have kids when you are grown up, you will enjoy them a lot more than the kids who are having kids do.
Oh, yeah: And try to marry someone you like, not just someone you love.
Divorce is not a necessary part of marriage, no matter what Hollywood or the daytime talk shows want you to believe.