Extinguishing the Fiery Dart of Offenses

One of the ways the enemy shoots his arrows at the believer is through conflict and offenses. When someone mistreats or opposes us, our instinctive reaction is to justify ourselves and do everything we can to get our way, before we know it, believers are holding grudges, refusing to fellowship, and allowing bitterness to take hold of their life all because we refuse to resolve conflict and offenses that happen in our life. How can we handle conflict and offenses in a biblical way instead of being defeated by the enemies arrows?