Purpose: This study aims to apply organizational psychology principles to foster positive workplace outcomes. It focuses on developing practical interventions that integrate theoretical and empirical findings from organizational psychology to enhance organizational effectiveness, employee well-being, and overall productivity. Key areas explored include employee engagement, job design, organizational justice, teamwork, and leadership development. Research Design and Methodology: This research employs a qualitative approach, primarily through a literature study, to explore organizational psychology principles. A comprehensive literature search strategy was implemented using academic databases such as PubMed, PsycINFO, and Google Scholar to identify relevant peer-reviewed articles, books, and other scholarly sources. Thematic and content analyses were used to interpret the collected data. Findings and Discussion: The findings indicate that effective leadership, employee engagement, a positive organizational culture, and organizational justice are critical pillars in shaping a healthy and productive work environment. Transformational and authentic leadership significantly enhance employee motivation and performance. High employee engagement is associated with greater job satisfaction, higher productivity, and increased loyalty. A positive organizational culture promoting trust and collaboration enhances employee engagement and organizational outcomes. Organizational justice—procedural, distributive, and interactional—contributes to improved perceptions of fairness, trust, and employee commitment. Implications: The practical implications emphasize the importance of leadership development programs focusing on transformational and authentic leadership behaviors, efforts to foster a supportive organizational culture, and the implementation of fair policies and procedures to build employee trust and commitment. Future research should explore the long-term effects of these principles in diverse organizational contexts.