Make living your life with absolute integrity and kindness your first priority.
Retirement can and will be a glorious time in your life. You'll love the freedom and ability to try new things. It's a new phase of life; a chance to be a beginner again.
The trick is to be grateful when your mood is high and graceful when it is low.
You can't have a better past.
Ask yourself this question, will this matter a year from now?
The next time you find yourself in an argument, rather than defend your position, see if you can see the other point of view first.