Enjoy the journey of life - marvel in what you learn about yourself and other people, and use it to make you a stronger, better person. "So often we become so focused on the finish line that we fail to enjoy the journey." -Dieter F.
Depending on how you define marriage will also depend on how you approach yours, interact with it and create it. When you see a happily married couple- take notes because they are "doing things" to make it that way.