3Monkeys has written up an interesting set of articles covering how to use the Emacs text editor, which is pretty useful if you are interested in learning how to use Emacs, or just want to learn some new tricks.

He's planning on keeping this series going, so if you are interested it might be worth it to subscribe to his feed.

Part 1 - Introduction

Part 2 - Basic Navigation and Editing

Part 3 - Buffers and Windows

Part 4 - Search

Part 5 - Replace

Interesting stuff. I'm more of a vim guy myself. On that note, 3Monkeys is looking for a guest author to write a similar series about VIM, so if you are knowledgeable, you should contact him via his blog.