Peace is one of the Fruits of the Holy Spirit. God wants us to have that Fruits of the Holy Spirits in our lives. Each fruits should be applied to live a godly life. We should also spread peace to our surroundings. How to be a peacemaker?
Peace and self-control goes the same. If we don't have self-control, peace will not be there, too. Taming our tongue, controlling our anger and guarding our words and actions are the focal points to be a peacemaker. Proverbs 21:23 says that "Whoever guards his mouth and tongue keeps his soul from all troubles". If you are just on guard, being a peacemaker is already possible.
Make a difference now. Start spreading peace around you. Start planting that seed of peace and you will sow justice and righteousness. Seek God's desires in your life, not your own will. Honor God in everything that you do and peace will just follow.