If you haven’t checked out ted.com, you should. Then you can also check out academicearth.org and youtube’s offering at www.youtube.com/edu
It is all the smart stuff with none of the Numa Numa or “boom goes the dynamite”. If you don’t know what those things are, check out those first… They are much quicker. Then get smarterer.
Be sure to check out some of the categories that may hold no interest to you. It is in these that you may find answers and paralels that will help you solve tomorrow’s problems.