I have no specific advice, but as someone who's been married 9 years as of today, here's some generalities:
* Marriage is *work*. It should be fun, too, as well, but it's not a walk in the park.
* I'm sure you give to your fiancee, and she gives to you. One important thing is to try to give what *they* want, not what *you* want [ever see that Simpsons where Homer gives Marge a bowling ball?]. Before we got married, our pastor had us read a book called His Needs, Her Needs. Very revealing book; men and women have basically the same needs, but the order in which they *prioritize* them is vastly different.
* 3 C's: COmmunication, Compromise, and Creativitiy. Every solid marriage--or even any relationship at all-- thrives on these three things.
* Patience.
* Money. Money troubles/arguments are the leading cause of marital strife. Find out how each person thinks of money, and try to understand that.
That's the heavy stuff, here's some positive stuff:
* Enjoy every minute of it. You are embarking on a grand journey, to share virtually every aspect of your life with each other. There will be peaks and valleys, but the valleys make the peaks seem all the higher--and trouble is always easier to deal with with a teammate.
* Marriage is a partnership--you may disagree on some/many things, but just knowing you have this partner who will stick by you, and you the same, is an incredible feeling.
Good luck, have fun, enjoy the ride.
And don't do what a friend of mine did the night before his wedding--he dropped the ring off the hotel balcony into the river in the early morning, about 6 hours before the ceremony....Not a good start. Luckily the jeweler was local, and a friend of his family, so they got him to open the store and got a replacement.