Husband, love your wife.
Wife, respect your husband.
Simple, biblical wisdom.
I thought of that, too.
It's also interesting to note that those seem to be the in-general hardest things for the respective spouse.*
And I don't think those are exactly discreet qualities, meaning that love engenders respect and respect enables love.
(Or put another way: if you love someone, then you have to respect them as a person; if you do not respect someone as a person you cannot love them.)
* — The feminist movement has made it especially hard for women to respect their husbands; and indeed has done much to destroy all dignity and respect for that role.