The other important thing would be to make certain that I enjoyed the moment for what it is, instead of stressing about the details, the people, the flowers, the food, etc etc. But, you know what they say about hindsight.
If you're getting married, or know someone who is, tell them to breathe through each moment and to really take in what is going on: laminate a specific moment in your mind and it'll be there forever in its perfection.
I was asked to create these awesome cuff links for a customer recently. It had all the aspects of the perfect keepsake: the latitude and longitude of where she was proposed to was on one link, with the bride and groom's initials in the center. The other link had the coordinates of their wedding venue and the wedding date adorned the center. These little beauties are going to be one of those cherished pieces that will (hopefully) be passed down through the generations that the new couple is going to help build.
The big day comes and goes so quickly. It's nice to have something that you can look at from time to time and remember that special moment when two became one.