How Stuff Works
"Learn How Everything Works!" I also recommend Stuff You Should Know and Stuff Mom Never Told You podcasts.
Snag Films
Watch FREE documentaries on almost ANY topic.
What Should I Read Next?
Enter the title of the last book you read/liked and it will provide you a list of books that are similar in genre/story.
Ted Talks
Fascinating videos about ANY TOPIC you could think of.
35 Random Corners of the Internet
Bored? Tired? Curious? Extremely Hyper? Check out these interesting and/or calming websites.
The Museum of Ridiculously Interesting Things
A weird and interesting collection of just...random things.