When we were not doing well, we had this problem of who is supposed to say hello first. Is it the person who walks in the door, or the one already in the house?

It goes back to the idea of treating the spouse at least as well as a stranger. If a stranger walked in the door, you would say hello. You would not be sitting there thinking, "shouldn't she say hello to me first?"

He would still walk in and just go about his business, but now I make the point of saying hello. It removes a lot of hostility from the air.