Access all MIT course material for free. The only thing you're not getting is a degree at the end. If you want to get smart but don't need a degree to think you are, this is an invaluable resource to have.
Take any course you want 101 to expert, it's all there.
Want to become a rocket scientist but don't have the $500k to get into MIT, don't worry. You can at least gain the knowledge of a rocket scientist. Whether that will get you to the moon is really up to you I guess.
*please see this comment for more details https://www.ozbargain.com.au/node/140218#comment-1935276
Hi dynamike - the MIT courses are really good. I had a quick look at a few myself.
Another user started a wikipage a while ago on all the institutions that add free courses online.
Feel free to add to it if you like:
https://www.ozbargain.com.au/wiki/free_online_courses