This report delves into the realm of effective business communication, emphasizing its significance in fostering successful interactions with both customers and colleagues. The report begins by explaining five diagnostic tools used to assess communication skills, including self-perceived communication competence, intercultural communication apprehension, personal report of public speaking anxiety, non-verbal immediacy scale, and talk-aholic scale. These tools are used to evaluate the author's communication strengths and weaknesses. The report then presents a literature review that explores intercultural communication, highlighting its importance in multinational corporations. The review covers the impact of cultural diversity on decision-making, the role of verbal and non-verbal communication, and the benefits of intercultural communication for business organizations. Finally, the report concludes with a comprehensive action plan designed to enhance the author's communication skills, focusing on areas such as intercultural communication, public speaking, and non-verbal communication.