Marriage isn't the end-point of a relationship. It's just a stepping stone, one aspect of a long-term evolution between two people who have, for whatever reason, decided to take a leap of faith and say, 'Well, hey, this is a person who I want to try with for the rest of my life.' Which is not a guarantee of perfection - far from it.
Goals are a means to an end, not the ultimate purpose of our lives. They are simply a tool to concentrate our focus and move us in a direction. The only reason we really pursue goals is to cause ourselves to expand and grow. Achieving goals by themselves will never make us happy in the long term; it's who you become, as you overcome the obstacles necessary to achieve your goals, that can give you the deepest and most long-lasting sense of fulfillment.
The most important thing you can do to achieve your goals is to make sure that as soon as you set them, you immediately begin to create momentum. The most important rules that I ever adopted to help me in achieving my goals were those I learned from a very successful man who taught me to first write down the goal, and then to never leave the site of setting a goal without firs taking some form of positive action toward its attainment.
When I was in the Peace Corps I never made a phone call. I was in Central Africa I didn't make a phone call for two years. I was in Uganda for another four years and I didn't make a phone call. So for six years I didn't make a phone call, but I wrote letters, I wrote short stories, I wrote books.
The quality of your life is dependent upon the quality of the life of your cells. If the bloodstream is filled with waste products, the resulting environment does not promote a strong, vibrant, healthy cell life-nor a biochemistry capable of creating a balanced emotional life for an individual.
Live life fully while you're here. Experience everything. Take care of yourself and your friends. Have fun, be crazy, be weird. Go out and screw up! You're going to anyway, so you might as well enjoy the process. Take the opportunity to learn from your mistakes: find the cause of your problem and eliminate it. Don't try to be perfect; just be an excellent example of being human.
The truth of the matter is that there's nothing you can't accomplish if: (1) You clearly decide what it is that you're absolutely committed to achieving, (2) You're willing to take massive action, (3) You notice what's working or not, and (4) You continue to change your approach until you achieve what you want, using whatever life gives you along the way.