Develop a comprehensive set of relationship-building techniques that incorporate principles from interpersonal communication, emotional intelligence, and social psychology to foster communication, empathy, and connection with others without relying on AI-driven solutions. The techniques should include methods for active listening, expressing emotions, resolving conflicts, and cultivating trust. Consider how these techniques can be applied across different types of relationships, personal circumstances, and cultural backgrounds, and how they can be refined over time to continuously improve relationship-building skills.