"Relationships 101" - for married folks, please?

Let's say you had to complete a series of courses before you could be issued a marriage license, and that divorce would cost you a fine and some community service.
What might be some of the lecture topics in your "Relationships 101" class?
I'll start and please continue:
Communication -- being clear and honest without being hurtful
Honesty -- the building block of trust
Temptation -- bird in the hand versus bird in the bush
Money -- it really is the root of all evil!
Grief -- how to survive loss as a strong couple
Sharing -- it's not just about toothbrushes and housework!
"Old Habits Die Hard" -- how to know when to compromise
Linkback:
https://tubagbohol.mikeligalig.com/index.php?topic=10953.0