What separates happy marriages from miserable ones?

Surprisingly, it's not healthy communication. It's not conflict resolution skills. It's actually the size of the marriage's joy gap .

Joy Gap/joi gap/ (n.)-1. The length of time between moments of shared joy

When the joy gap gets bigger, problems are more likely to overwhelm you, resentment creeps in, and you start to feel distant and alone in your marriage. When the joy gap is smaller, you regularly feel connected and happy, problems feel manageable, and your marriage becomes a reliable source of joy. But how do you ensure that you're experiencing joy regularly?