More knowledge is available at your fingertips than ever before in history, with more of it being free than not.
The equivalent of a college degree is now free and highly available, merely for the doing. But don't worry about assembling four years worth of balanced curriculum to learn what will take you to the next level. The 21st century is about learning in the moment of need.
So get good at learning fast, at learning specific, and at applying what you are learning immediately. How do you do that? Always be taking a class, a course; always be learning. Find something that interests you and dive in!
Here are some excellent sites to do just that.
https://archive.org/ - Holy Information Highway, Batman! The Archives of the Internet! *Amazing* amounts of information, though it can take a bit to find what you want.
https://www.udacity.com/ - most courses cost $
http://www.openculture.com/ - learn all kinds of things, links to thousands of online courses
http://ed.ted.com/ - Lessons in the TED style
http://www.mentormob.com/ - in BETA; I haven't seen the whole thing yet
http://www.memrise.com/ - flashcards with info
http://www.loc.gov/ - The Library of Congress
https://www.coursera.org/ - I love the courses here!
http://www.gutenberg.org/ - tens of thousands of free eBooks
https://learni.st/ - crowdsourced learning packs
https://www.boundless.com/ - Open content for teachers and teaching materials
http://openstaxcollege.org/ - free textbooks
http://collegeopentextbooks.org/ - free and open textbooks
http://ocw.mit.edu/index.htm - MIT Open Courseware
http://oyc.yale.edu/ - Yale Open Courses
http://e-booksdirectory.com/ - almost 9,000 free ebooks in all kinds of subjects
http://periodicvideos.com/ - Science videos organized by elements in the Periodic Table
https://github.com/vhf/free-programming-books/blob/master/free-programmi... - free books on programming