How Stuff Works
There are a few sites that I really enjoy going to every now and again to read up on, well, how stuff works.
One of my all-time favorites is howstuffworks.com. It is informative, easy to use and has so much information one could spend days just absorbing the content.
My favorite area is the Electronics Channel. This area has information ranging from How Batteries Work to How the Xbox 360 Works.
I highly recommend this site to anyone who is interested in getting a basic understanding of a wide range of topics.
What is your favorite place(s) to go online and do a little autodidact learning?