Forget issues of the past. Don't remind your partner with his/her
mistakes of the past. That will ruin your present happiness.
Life is too short to waste time hating anyone. Don't hate others.
Make peace with your past so it won't spoil the present
No one is in charge of your happiness except you
Realize that life is a school and you are here to learn. Problems
are simply part of the curriculum that appear and fade away like
algebra class but the lessons you learn will last a lifetime.
Smile and laugh more
You don't have to win every argument. Agree to disagree.