During performance reviews and employee evaluations, managers and supervisors must strictly avoid making subjective, personal, or emotionally charged remarks that lack objective documentation. Common pitfalls to avoid include bringing up unverified gossip, attacking an employee's character rather than focusing on specific job behaviors, making vague statements without concrete examples, issuing surprise criticisms that were never previously discussed, or using biased language. Constructive feedback should always remain professional, actionable, and centered on measurable performance metrics.