10 Specific Ways to Improve Your Productivity With Emacs
The tips in this little document are geared towards Emacs power-users. You should be familiar with the basics of launching and editing with Emacs, and you should already know the essentials of copying stuff into your .emacs file, and debugging things (or finding a friendly Emacs Wizard) when something goes wrong.
Source: 10 Specific Ways to Improve Your Productivity With Emacs, and article by Steve Yegge.