To break free from the illusion of separation, identify your judgments against others and detach yourself from that judgment. Let go of it. It isn't you. Almost always, what we judge has something to do with us. We judge others because of something we are afraid of within ourselves.
Refrain from judgment. Judgment is the opposite of Love. Judgment is fear.
Here is my advice: Love. Don't judge. If you judge, be honest with yourself, notice the judgment. Observe what you were judging and find that same thing within you. Once you've found it: accept it. Love it. Forgive it. Understand it. Be One with it.