How to have harmony in relationships?

Image by Sint-Katelijne-Waver via Flickr

Life can only be enjoyed completely if lived in harmony with people around us, be it family, friends, or coworkers. The moment harmony is disrupted joy is gone from life. However, all of us experience moments in life where harmony in relationships is lost and peace of mind is also lost along with it. It happens even with people we love and in relationships that we value and that are important for us in our life.

So the question is how this can be changed and how can we have harmony in relationships?