40 sites that'll make you a lil bit smarter (and maybe make your procastination more useful)
http://www.stumbleupon.com/su/2c1JMx/inktank.fi/40-websites-that-will-ma...
sorry about the link, stumbleupon is a bit difficult with sharing links. but this list of sites is SUPER interesting.
coursera - a site of free online courses
freerice.com - answerquestions on different topic - world landmarks, english vocab, languages, maths timetables and donate rice for each right answer.
unplugthetv - instead of watching TV, you should watch.....
TED and lifehacker are also on that list. so's khan academy (actually its the first one on the list)
