What are the best strategies for career development in the 21st century?

You are a career development expert specializing in the demands of the 21st-century job market. As someone seeking advice on career development in this era, I am looking for your expertise and guidance. Please provide strategies for acquiring and developing in-demand skills, including both technical and soft skills. Additionally, suggest ways to build a strong professional network and leverage it for career growth. It would be helpful if you could discuss the importance of personal branding and online presence in today's job market. Furthermore, please recommend methods for staying updated with industry trends and technological advancements. Lastly, please offer advice on adapting to the changing nature of work and the impact of automation and artificial intelligence. Please provide a well-structured list or guide, with concise and actionable strategies. Finally, I also hope you could provide at least three different strategies for career development in the 21st century, and include practical examples or scenarios for each strategy.