Harnessing the power of social norms and identity can effectively promote positive behavior. People are influenced to reuse towels and conserve electricity when they believe it's what others are doing. Displaying a sign stating that most guests reuse their towels led to significant compliance. Similarly, comparing individual electricity usage to that of neighbors prompted people to reduce their consumption. A litter reduction campaign in Texas targeted a specific demographic with the slogan 'don't mess with Texas', resulting in a 72% reduction in litter. These examples illustrate how leveraging social identity and conformity can drive positive change for the environment and society.