When you have love for others, you will have good wishes for them.
Your desire to change them will then be for their good and not for your own
selfishness. Others will quickly respond to your unselfish love and
you will find them changing.
Think of one person you want to bring about a change in. Before you think of changing that person let there be a lot of love for that person in your mind. Also make sure the change you want in the other person is for his own good and not for your own selfish reason.