What you can do in your own family:
Pick a day and time that works for everyone in your family and commit to it. Treat it as special, and don't let other events or invitations supersede it (except in very special cases, of course). Make it special by doing one small thing over and over at every gathering '- that's the ritual, of course. Whether it's recounting a story from your week, as my family does, or playing a certain game together, it's something your children '- and you '- will come to count on and cherish as part of your way of being a family.