How do you say sorry to your spouse when you've done something wrong?

Hello, I know how much it takes to say sorry to your spouse, but at the same time that one can do to ease the relationship. You can break the ice in this simplest way. One should shut one's mind and say it as effortlessly as one can. More you will make it appear as killing your ego, more difficult it would be. It is one of the toughest thing for me as well to do, but now I have with time learnt that it is the surest way to make one's relationship better, that is, to accept that your were wrong and you accept it.