Knowledge-work is a discretionary behavior, and knowledge-workers should be viewed as investors of their intellectual capital. That said, effective knowledge-work is mostly dependent on the performance of individual knowledge-workers who drive the success of knowledge-intensive organizations. Therefore, the study takes the perspective of personal knowledge management in enforcing the effectiveness of knowledge-work activities. This study empirically demonstrates that knowledge-workers’ behaviors are dependent on their motivation, ability and opportunity to perform knowledge-work activities. This study provides insights and future directions for research on knowledge-work as a discretionary behavior in organization and the factors influencing it. Scholars can investigate the effect of empowerment of individuals on their tendency to knowledge-creation, knowledge-sharing and knowledge-application. Since personal-knowledge often raise the issue of knowledge ownership, further attention to ethical issues may bring valuable insights for KM in organizations.