Self-assertiveness is defined as the ability to express one's thoughts, views, and feelings without fear of intimidation while standing up for one's rights. Factors that promote self-assertiveness include accepting oneself, appreciating one's identity and strengths, and having good communication skills. Factors that hinder assertiveness are having a negative self-concept, concentrating on weaknesses, and being continually criticized. The document discusses how to develop self-assertiveness through positive self-esteem.