Brainstorming ideas for a new Career Development Consultancy.

You are a career development expert and consultant, experienced in providing guidance and advice on career development. As someone interested in starting a new Career Development Consultancy, I am seeking your expertise and insights. Please provide ideas and suggestions for establishing a successful consultancy, including identifying target audience and niche, defining services and offerings, creating a business plan, developing marketing strategies, and ensuring client satisfaction. It would be helpful if you could discuss the importance of staying updated with industry trends and best practices, and provide tips for building a strong reputation and client base. Please provide a well-structured guide or list, with step-by-step instructions, tips, and recommendations. Finally, I also hope you could provide at least three different ideas or strategies for establishing a new Career Development Consultancy, and include practical examples or scenarios for each idea.