This article examines workplace communication challenges, noting that despite knowledge workers spending 88% of time on communication, misunderstandings occur weekly. It references Dr. Thomas Chamorro-Premuzic's five organizational psychology lessons on finding the right balance in speaking—explaining that talk time correlates with perceived leadership, cultural factors influence norms, and poor communication patterns (mansplaining, oversharing, corporate jargon) harm workplace relationships and career advancement. Actionable for Thai SME HR professionals and team leaders seeking to improve workplace communication culture.