Education is a lifelong process. I enjoy learning immensely, and I don't know about you, but I also love to read. I think I would find it difficult to learn without loving to read, but even I need a break from line after line of unending text.
The following is a short list of online video resources that will allow you to take a break from reading without causing the brain-softness that is an unavoidable consequence of watching cable TV. Let's be honest, are you really going to "keep sharp" by watching a reality series about parking attendants? I don't think so, but that's just my opinion.
Links to all of the resources are at the bottom of the article. The following list is in no particular order, and is by no means complete. Let me know in the comments section if there is a great resource that you think should be added to the list, but only include video and audio. I can't speak for everyone, but reading isn't much of a break from reading.
MIT OpenCourseware (OCW): This is a great option for people looking for university level courses. MIT's OCW offers content from hundreds of actual MIT courses, including videos of lectures, lecture notes, assignments and solutions, projects, example exams, as well as other multimedia content. This content is the same as what is offered to the students enrolled in the courses, although following along on the OCW site will not get you any credit for the course. There is a broad range of topics, from biology and chemistry, economics, political science, literature, engineering, and business studies. If you are looking to enrich your understanding, or are a university student looking for supplemental materials for your own course, this is a great place to start. I have personally watched many hours of lectures as a supplement to my current computer science education.