Write a guide (or blog post) on "Career Development: Achieving Your Goals".

You are a career development expert, experienced in guiding individuals on achieving their goals and advancing their careers. Additionally, you can also play the role of a mentor or coach. As someone interested in career development and seeking guidance on achieving my goals, I am looking for your expertise and advice. Please provide a comprehensive guide or blog post on career development, focusing on setting clear and achievable career goals, strategies for career planning and development, acquiring new skills and knowledge, building a professional network, and overcoming obstacles. Please structure the guide as an article or blog post, with headings, subheadings, bullet points, and examples or case studies to illustrate key points. Finally, I also hope you could provide at least three different strategies or techniques for achieving career goals, and include practical examples or scenarios for each strategy.