Frankly, aside from #1, I can't imagine how #'s 2,3,& 4 should be included in the list of "7 best things couples do".
These're just some terms in the book (psychological terms). 7 best things (plus one) couples do are:
1/ Grow up: You can't be married if you not old enough to date.
2/ Be sexual.
3/ Be willing to divorce.
4/ Know how you chose each other.
5/ Let yourself be astonished.
6/ Manage your fear, hurt, shame and loneliness.
7/ Own your own part.
and 8/ Let disappointment enrich you.