When you see goodness and kindness in another, search your soul to see if you actually like those qualities about yourself. When you are annoyed, angry, or feeling disdain for another, search your soul to see if those qualities reside within you.
We are all mirrors for each other. By looking objectively at another person, you can tell a lot about yourself. Qualities we see in another are usually directly related to the characteristics we see in ourselves.
Take this knowledge and use it to your advantage. Be loving and kind to yourself as you realize who you are. When you notice something that doesn't make you happy or brings about judgment - let it go and find ways to work through these thoughts. Remember, you are perfect now. You are enough now. See yourself in positive ways and mirror those expressions.