Video sites, software tips and educational links

Make use of is a technology site giving all sorts of advice, from operating system tips to best websites, and over 50 software guides if you are grappling with new applications. Try also here for education related posts.
Video sites recommended include VideoSci.com and All things Science for science, and Keentalks, TED, Brighttalk for general inspiration, SolveforX for problem solving ideas, and GreenTV for science & the environment.