Habits shape how we work, how we manage stress, and how we relate to others. They determine whether we move closer to our goals, or repeat the same mistakes.

The same is true in our romantic relationships. Our satisfaction, stability and sense of connection are directly related to the behaviors we default to every day.

As a psychologist who studies couples — and as a husband — I’ve seen how some of the most powerful relationship rituals also happen to be the simplest. Here are five habits that reliably show up in the happiest, most resilient relationships.

Humans are biologically wired to focus on the negative. This bias helped our ancestors survive by scanning for threats. But in modern relationships, it often leads to pessimism, criticism or chronic dissatisfaction.

Over time, a glass-half-empty mindset trains partners to look for problems rather than moments worth appreciating. That’s why what researchers call “capitalization,” or how partners respond when the other shares good news, is so important.