1) Commit to continual personal growth Become the best YOU that you can. Continually make positive changes for YOU. The personal help section of the bookstore has a wealth of knowledge.
2) Commit to being the best "Dad" or "Mom" YOU can be if there are children involved (you are their role model). Stand up for your right as a parent and do what is right for them. Do not let your spouses poor choices affect YOUR relationship with your children.
3) Find internal happiness. Do things that make YOU happy. Enjoy the day (even if others are not). Do not put your happiness into another persons hands - IE DETACH.
4) Be ahead of the curve and be able to predict what spouse may do, but more important: HOW YOU WILL RESPOND TO THEIR BEHAVIOR.
"What is best for my kids is best for me" Amor Fati Link to quotes: https://www.divorcebusting.com/forums/ubbthreads.php?ubb=showflat&Number=2879712