I would say that the "secret" to our marriage is having Christ at the center of it. During year seven, we almost split up and got a divorce. It was that year that we decided to get right with God and go to church. It is my firm belief that saved our marriage. Why? Because the teachings of Christ very much apply to marriage but one in particular: Selfless service.
If you want your marriage to work, you have to think of it not as a dominating man vs a submissive woman. No no no! It's more like a partnership where the both of you are back-to-back, each looking out for the other's back. You don't worry about your needs...she does that for you. She doesn't worry about her needs...you do that for her. You find ways to serve her and she finds ways to serve you! THIS is what a long-lasting and fulfilling marriage is all about!
To do this, you have to completely trust each other and communicate what you like. As the years go by, you'll KNOW what she likes and she will of you as well. The minute you start worrying about your own needs, you're on the path to divorce!
I would also counsel you to wipe the thought of other women out of your mind! You can't serve her and mess around on her at the same time! It's simply not possible. If you see a sexy woman, just don't say anything. Why? Because it's not of service to her...you'll only make her feel insecure and unloved. That's not serving her needs.
I don't know if you're a church-going person or even a Christian. However, this principle will definitely help you keep your marriage strong throughout the years. I would also advise you to consider reading some Christian literature on marriage so you get a better idea of the principles that make marriage work, even if you're not a Christian. Wisdom is wisdom, regardless of where it comes from!
I wish you and your new bride a long and prosperous life together!