Feeling dumb? Visit Tutorialized.com!
Tutorialized.com, a great online resource for people who need to upgrade their brain, gives you access to free tutorials for some of the most used applications available today. A lot of these tutorials are written by simple users, while others seem to be made by professionals. The software list is HUGE: From Word to Excel, going from Photoshop to operating systems in general, there is something for everybody on there.
If you still need to fill up your head with knowledge after this, you can also have a look at the MIT OpenCourseWare project, a great website that provides free tutorials for self-learners around the world
Check it out! (Via Technology filter)