Thanks for all the feedback on the other thread (your top 5 websites). I'm slowly going through all the ones people listed. But if you had to pick a few sites that are really informative, funny, or handy for whatever reason, not just facebook or espn please post them here.
khanacademy.org -great videos explaining everything from linear algebra to organic chemistry to the French Revolution
ted.com -videos from TED conferences. many of these are really inspiring.
youjizz
redtube
I don't know why but whenever I watched Nova videos in school, I always got extremely bored but for some reason when I come across them at home, I can't stop watching.
http://www.pbs.org/wgbh/nova/programs/
If you're awesome, then you'll enjoy this website. It's updated weekly and gives an insight on who your heroes should be, not really, but it's an interesting read on some interesting characters. I think my favorite one is The Kraken from 12/11/09.
http://badassoftheweek.com/list.html
A third one that I can think of is listverse. Lists are easy to read in a small amount of time and can be easy to remember. This site contains lists from '10 Fascinating Unique Word Pairs' to '10 Stories Behind Crazy Sport Traditions' to 'Top 10 Places You Can’t Go'. It has everything. I mean even if you don't agree with these top 10s then you can at least get some insight into another person's thoughts.
Also, if anyone on the internet doesn't use "StumbleUpon!" then you either 1. have a life or 2. don't know what you're missing.
This is my contribution for now. Maybe I'll have more later. Enjoy this you online runners. Run across the internet via the power of knowledge, albeit possibly useless knowledge.