Comprehensive, nicely illustrated collection of OS X keyboard shortcuts by Matt Gemmell:

I recently wrote an article about being productive on a small screen, which mentioned my belief that the most effective route to productivity on a computer is learning the available keyboard shortcuts.

In this piece, I’d like to share some of the keyboard shortcuts and related functionality that I use every day on the Mac.

And if you also like to learn keyboard shortcuts for your iPad, don’t forget that iOS 7 supports them in both Apple and third-party apps.