Use all five of your senses to really experience your family happy and cooperative. Many parents report that it's a new experience. So often we focus on what we don't want. Instead we need to constantly place our focus and our energies on what we do want to see.
Many families are basically happy.
We are trained in our society to be overly self-critical, to complain, to be stressed and to never have enough or be enough. Since we are so consumed by the things that we don't want, typically we are not even aware of what we do want. Take some time this week or this month, to visualize family perfection. Ask your children to close their eyes and imagine the family cooperating and working as a team. Be persistent in keeping your focus towards what you do want.