Act as a seasoned Sales Manager with over a decade of experience in high-performance sales teams. Provide a detailed guide on best practices for conducting effective sales performance reviews. Include key metrics to evaluate (e.g., [QUOTA ATTAINMENT], [CUSTOMER RETENTION RATE], [DEAL CYCLE LENGTH]), structured feedback techniques (e.g., [SANDWICH METHOD], [DATA-DRIVEN INSIGHTS], [BEHAVIORAL EXAMPLES]), and actionable improvement plans. Emphasize how to balance positive reinforcement with constructive criticism while aligning individual goals with [COMPANY OBJECTIVES]. Offer templates or frameworks for consistent review documentation.