"A grievance is most poignant when almost redressed."
Air your grievances frequently and expect the same in return.
I would argue that most relationships fail because they don’t follow this rule. This isn’t easy and it certainly isn’t fun but it’s vital to a successful relationship, otherwise one person airs all their issues and the other just feels unheard, worse yet, neither of you speaks up when your upset and eventually something will give, a massive fight will ensue, and you both will say and do things you will regret. The hard work of developing self-awareness is vital to achieving this goal as you need to have deep insight into yourself to understand what you are upset about and express it frequently.