Conan O'Brien talked for over an hour to Jack White last week, and they discussed creativity, success, failure, work, books, authenticity and a host of other things. Even if you don't like either of these guys, their conversation is well worth listening to because they have thoughts and know how to express them.
MusicTheory.net offers music theory lessons covering everything from basic note recognition to difficult chord inversions. The lessons can be customized to test users on the notes and concepts they need to practice the most. MusicTheory.net also offers calculators and tools handy for composing music. And if you just need some staff paper, MusicTheory.net offers sheets that you can print. (Tip from Free Technology for Teachers)