I just helped to teach a Catholics Can Come Home Again (author Carrie Kemp), and I learned so much as we brought the returning Catholics up to snuff on Vatican II, etc.
It was a wonderful experience, and I would encourage every lay person who cares about family members and friends who are no longer active to go and talk to their pastor about this -- or a similar -- program. Check at your local Catholic bookstore; they will order the book for you.
Tonight I am starting a Bible study/faith sharing group with some of the newly returned Catholics. We started with 13 the first night, then added 4 more, and ended up with 9 finishing the class! It went way beyond our expectations.
Thank you, Holy Spirit!