The Right Kind of Beauty
Nov 2000 - Hayden Duvall
This article discusses what to do to produce graphics that look good. It's directed towards artists more than programmers.
Adobe Studio Exchange
Exchange photoshop files, such as actions, brushes, etc.
Creating Fire in a Particle Editor
Feb, 2009 - Bulatov Evgeni
Explains how a particle fire effect can be created with Magic Particles. The explanation is detailed enough that this can probably be brought into other particle systems with similar capabilities.
Make a Particle Explosion Effect
Oct, 2009 - Mike McClelland
An excellent article that shows what goes into an explosion particle effect. Directed more towards the artist than to the developer.