Moderate your convictions. Thinking in absolutes and holding to convictions without ever considering the viewpoints and perspectives of others is a sure way to live a life without peace. This type of extremist thinking usually leads to reactive, hasty, and driven behavior that lacks the benefit of reflection and deliberative thinking. While this may be convenient because it allows you to act with the confidence of absolute conviction, it blocks out other realities in the world and can easily lead you into conflict when other people fail to agree with your convictions. It's harder work to remain open-minded and ready to review your understandings, yet it's more rewarding because you'll grow as a person and live in greater harmony with those around you. Moderate your absolute convictions by always being ready to question and to reflect. Accept that your beliefs, faith, passions, or opinions are but some among many other beliefs, faith, passions, and opinions in the world. Follow an ethic of moderation that values human dignity and worth; follow the one true absolute, which is to treat others as you wish to be treated yourself (The Golden Rule).
Find a variety of things to do in your life if you're finding yourself slipping into immoderate stances about other people. It's hard to be immoderate when you're busy doing a range of things and seeing a wide range of people from all walks of life.
Cultivate your sense of humor. Humor is a peace-lover's disarming charm; few fanatics are ever humorous because they're too busy taking themselves and their cause too seriously. Humor allows you to release tension and to show up the repressive tendencies of extremist thinking.