Marriage takes quite a bit of work. It is two people, coming together to intentionally create a life that works well. A great marriage however, is simply the result of a lifetime of work. There is no luck involved. It is about unlearning old patterns that no longer work for you, and relearning new patterns that can move your marriage forward.
In my opinion, one of the most helpful tools that all couples should learn within their marriage is the 5 love languages.