The worse thing you can do in a conflict resolution is to come up with a solution worse than the problem you were trying to solve. There is a tendency to do this. If you don't like it, I'll just have my money for me and you can have your money for you. Now the relationship is split. These four steps in an atmosphere of rationality and calmness will allow you to solve disagreements.
Disagreements are neat.
They allow you to learn. Disagreements are good for the relationship because they allow you to go farther together and cope and develop strategies. Allowing you to move through life overcoming obstacles. That is what disagreements are, just an obstacle that allow you to become more stronger. What to do with it.