“Uncertainty is an uncomfortable position. But certainty is an absurd one.”
Learn Spanish resource pack
Free online courses at MIT & Stanford
Khan Academy
I love Vsauce, the YouTube channel where Michael brings you all kinds of images, crazy stuff for sale, art, and - my favorite - DONGs: things to "Do Online Now Guys." From games to interactive science to single-purpose web sites, he usually brings more fun than you can do in a day in each episode. Cool!
Popular Science Magazine online has improved over time and now (in late 2011-early 2012) is strong in all the same things we loved growing up with the paper magazine in the 70's.
I get a good dose of daily web, technology and light society news from Mashable.
NASA has an array of sites and YouTube channels with piles of awesome:
We Solve for X is a video-based site with talks, solutions and projects that solve large-scale planetary issues, dubbed "moon-shot" problems. Leaders, inventors and inventors present in videos of 20 minutes or less. Inspiring and informative.