The Aparecida bishops give their people fourteen proposals for ministries to the family. Here is the first:
a) Bring about comprehensive and organic commitment to families from other ministries, and from marriage and family ministries, movements, and associations.
You could write a book.
If I were to think of liturgy for starters, certainly family opportunities beckon in music, welcome, or ministries of acolyte/server. I’ve also seen small family groups engaged in the ministry of sacristan.
In pastoral care, family visits to the elderly would seem most appropriate, more so than visits to the sick. Although I do recall a parish that offered an opportunity for teens to join parents in hospital and home visits to bring Communion.
Many parishes offer social opportunities for families. While there may be a need for couple-time and youth ministries, these could be well-balanced by offerings across generations. On this point, I remember an active youth committee resisting a proposal to bring LifeTeen to a parish. They were articulate in stating the value from attending Mass with their families; youth Masses had no appeal.
For deeper examination, an English translation of the 2007 document from the Aparecida Conference.