Big Picture Thinking

That's all it takes to have a successful relationship. You will realize that you are in this relationship for the long term so your thinking about what you do should be based on long term happiness. If you know that you have done wrong to your partner, all it takes is for you to say sorry and listen to your partner's point of view on the matter. It may feel slightly shameful (and bruising to your ego) to say you are sorry, but that is such a big factor when building trust with your spouse.
Your ego will want you to hold onto your hurt feelings, maybe prolong the fight or argument so that eventually you are able to twist what is being said so that it seems like you weren't in the wrong in the first place. This is just manipulation and will only make your character as a person weaker. Sometimes its an absolute struggle to control your anger, and if this is the case, then its worth seeking some anger management techniques to help with your issue. If you can admit that you made a mistake, that you are willing to hear what your partner has to say about the matter (without interrupting with your defense) and strive to rectify your mistake, then you will create an amazing, loving and honest relationship.

Its a Two Way Street

Of course this is a two way street so there must be some mutual respect and understanding on the concept of saying sorry. Your partner must be prepared to admit when they are wrong and to understand your point of view on the given situation Love should not be a battle ground. Yes we are all different. We have different likes and dislikes. But the point of a loving relationship is to be a team, not enemies. If you find that you are prepared to admit your faults, but your partner refuses to cooperate and at least try to see the bigger picture in the relationship, then you may not be a good fit for each other.

We Should All Practice Empathy

When an argument or disagreement ensues, try to put yourself in the other person's shoes. Try to understand what is concerning them. Seek to understand, then to be understood. It is as simple or as difficult as you want it to be. Therefore, you are in control. Do your best to make it as easy to understand your partners point of view as possible.
Most people don't want to cause trouble in a relationship, just for the sake of inflicting pain. They are probably just not being understood by those around them so they lash out in an attempt to be seen and/or heard. Learn to read the signs before conflict begins. Also, don't expect an overnight success in your attempt to change a relationship that has for so long run a certain way and is now expected to change direction. There will be times when your past habits and emotions will try to over-run all your current efforts, but stay aware of the process, because in time you can truly create a stronger relationship.... If you try!

Say Sorry

Saying sorry and meaning it is not a sign of weakness, it is a demonstration of strength and respect for the success of your relationship. " Put your ego aside". You don't have to win every argument, but you must always try to maintain a sense of trust between you and your partner. If this cannot be done, then you are better off on your own or with someone else.
Love is not a battlefield, don't allow your inflated ego to make it one. You and your partner deserve to be happy.

Thanks for reading,