Increase the amount of connectedness in your child's life. Such connectedness sustains us. Connectedness is the key to mental health in children and adults alike. Unfortunately, over the past fifty years, people's sources of connectedness have eroded. The extended family, nuclear family, neighborhood, church, and most other strong connections have weakened.
People feel more on their own now than ever before.
This is ironic, because we are technologically more connected than we've ever been. But humanly we are increasingly isolated and set apart. This is not good for children. Their development of confidence, optimism, and security depends upon their establishing a solid sense of connectedness early on. Try to build that sense into the lives of your children as much as possible.