In addition to Adam's recommendation of chefsteps.com, I'd recommend
Khan Academy. So much free information it's incredible. I've learned about such diverse topics as grammar and second order differential equations. Along the same line are Singularity University and edX. If you want to learn something, you can. Like Terrence said, the internet is great.
Also, I think it would be sweet if you guys (Adam, Terrence and Ross) can post your favourite things on here after you say them on-air, so we can have a one-stop, searchable compendium of favourites.