I understand that you're looking for general online courses that could benefit a wide range of careers. While I can provide some suggestions, please keep in mind that the "best" courses can vary greatly depending on your specific career goals, industry, and current skillset. Here are some well-regarded online courses that offer valuable skills applicable to many careers:

Coursera: This platform offers courses from top universities and institutions. Consider courses like "Learning How to Learn" and "Mindshift" to improve your learning techniques and mindset Do My Online Exam.

edX: Similar to Coursera, edX offers a variety of courses from universities worldwide. Check out their "Professional Certificate" programs in areas like data science, project management, and digital marketing.

LinkedIn Learning (formerly Lynda): Offers a wide range of courses on technical and soft skills. Courses on communication, time management, and Excel skills can be beneficial for many careers.