Emacs Rocks!

If you always wondered if it pays off to learn how to use Emacs (spoiler: the answer is most certainly yes), Emacs Rocks! is for you. Magnar Sveen produced more than a dozen of screencasts presenting cool editing features of Emacs.

One of my favorites is this one, demonstrating the power of macros and elisp.

Magnar also has blog about useful snippets for Emacs at What the .emacs.d?. Note that many of the posts presented there found their way into the excellent Emacs Prelude, which I highly recommend to have a sane start with many powerful features already preconfigured.