This is the first tutorial I made. It covers using layers and Photoshop actions to add special effects to an image. Links to the actions used in the tutorial are below. They're not freebies, but they're there if you want to check them out. You may be able to find similar actions for free if you look around.
Electric Energy Photoshop Action
Blizzard Photoshop Action CS3+
I'm still looking for a lightning/energy Photoshop tutorial that I thought would be a good resource for anyone not using these two Photoshop actions. If anyone knows of a good tutorial that might be worth linking here, let me know.
This tutorial can also be viewed on my Deviant Art page .