The most guaranteed way to turn your marriage away from destruction is to choose to turn yourself away from sin.
It is so important in marriage to remember that sin is not just avoiding those big, “no nos.” Sin is disobedience, too. It’s not just avoiding things like adultery, it is also ignoring the voice and nudges of God. If God whispers for you to hug your spouse and tell them that you love them, in the middle of a difficult conversation or disagreement, and you refuse that is sin for you. If God tells you to send a text message saying that you’re sorry and your pride gets in the way, that is sin for you. Satan would never tell you to be kind and forgiving towards your spouse, so when you feel those prompts, thank God for looking out for your marriage and obey Him.
Submit therefore to God. Resist the devil and he will flee from you.
James 4:7 NASB