"Don't ever go to sleep angry at your spouse. Because the next morning, you'll be more distant then you were the night before."
My ex-father-in-law gave me this piece of advice when I was leaving India to head back to Toronto with my ex. The advice was great while it lasted. Too bad my ex was a complete a-hole and couldn't follow his father's advice.
Nonetheless, the advice was good. I use this advice not just when thinking about my bf, but also with my other relationships. By resolving the issue and either coming to an agreement or settling the issue all together before saying goodnight, it doesn't leave a bitter taste in your mouth. It leaves your relationships a little battered, yes. But still healthy enough to resolve the next day. Pain takes a long time to go away. But, at least you know and the person you love or care for knows that you're not pissed off at them 'cause honestly, who knows if you'll wake up the next morning? And if you did wake up, I bet you, the bitterness would last and there would now be no more words to speak.