Transitions in Marriage

So I might be wrong, but I feel like we start preparing for marriage from the day we first arrive here on earth. It makes a lot of sense in my head. AS we grow up, we learn how to communicate. We learn how to interact with other people, including the opposite sex. We begin to recognize who we are, why we are here, and what we need to do in this life. One thing that we need to do, and is also commanded of God, its to have children and to raise them up into the people that God would have them be. Having children is actually crucial to mankind. That is something that I think people tend to forget. Something else that people are forgetting is the data. People who get married and don't live together before hand have way better chances. They are more likely able to merge into one, rather than be parallel lines. Man isn't that interesting?
Okay, so let's get back on track. Not only is preparing for marriage important, but transitioning into marriage is crucial. Many problems can arise when two people get married. For starters, you are living with someone of the opposite sex. You are two very different people and you have to learn how to deal with habits. One may be allergic to your favorite food. Someone will leave their socks on the floor in the family room. Maybe they don't do the dishes like you do and that annoys you. Maybe they always leave the toilet seat up. Maybe there are longs strands of hair everywhere, in the shower, on the couch, and you think it is the most disgusting thing ever. See? There is so much transitioning to do when a couple gets married. I can't even imaging what is must be like. Actually, that might be a lie...
I have grown up with three brothers and three sisters. What an adventure that has been. I have experienced many things that I think a newly wed couple might have to deal with such as: tons of hair in the shower, dishes being placed in the wrong spot in the dishwasher, etc. In a way, you could say that living with brothers and sister has prepared me for the transitions I will have to make in my future marriage. However, there are far more adjustments that are made in a marriage than living with siblings.
Number one would be reliance. You have to change your reliance from your parents, to your spouse instead. If you get severely hurt or you are in a mid-life crisis, you call your spouse first. Not your dad or mom. Number two is obvious: financials. You have to support each other, share earnings and income, and decide together where you want the money to go and what you want to purchase. Food is also a really big one. You have different eating habits than your spouse because each family is different. You have to grow accustomed to what is best for the relationship, regarding food obviously. You also have to learn how to balance the relationship, having enough time for school, work, and dating. These are all adjustments and new habits that can be incorporated in the relationship within the first month, however. Let's talk about the first year.
Questions will arise when holidays come up. Which in-laws do we go to? What traditions and rituals are we going to practice in our own family now that we have one? What values do we want to uphold in our relationship, friendships, and personal beliefs?
All these are great questions that should be discussed with a spouse. I wish I had some type of advice to help with transitions, but I don't. I am not married yet, and probably wont be for the next while. So, if you have advice, feel free to send it my way. ;)