Try thinking of it not in terms of just your marriage.. what about relationships with others? Your D? Friends? Colleagues? What changes can you practice now so that your next romantic relationship (whomever it is with) will be better.
Yes. For a LBS, this is essential as we don't have our SO with us on a regular basis (and accepting to our efforts) to practice. But I believe almost all skills that apply to our M's and intimate R's can be applied to normal social and professional environments on a smaller, although still significant, level. So for all LBS's, make your list and start finding ways everyday to practice.
That's exactly what I'm doing, card. I started my list. And I'm thinking if ways to put it all into practice every day. Have you started your list??