The 90/10 Principle states that 10% of life is made up of external events outside of our control, while 90% is determined by our internal reactions to what happens. How we react to situations, both positive and negative, has a significant impact on our experiences and outcomes. While we cannot control what happens to us, we can control how we respond. Applying this principle means not letting uncontrolled external events ruin our day and instead focusing on handling situations with composure and a positive outlook. This allows us to avoid unnecessary stress and conflict so that minor issues do not spiral out of proportion and negatively impact other areas of our life.