Some people are just so generous on the Internet it astounds me. Sean Jordan is one of those people. Comic book writer Sean Jordan provides many useful resources for those of you funny-writers:

There is no correct way to script a story.

Some writers script in a very rigid format, not unlike a screenplay, giving careful stage directions to help the artist portray a character's movements and expressions. Other writers focus on the dialogue, leaving the artist free to make decisions about a character's actions. Some work by the "one page rule," which states that if an entire scripted page exceeds one letter-sized page in a 12-point, monospaced font, it's too long. Others cram as much dialogue as they can into a single comic page, hoping the letterer will be able to fit everything in. All of these methods are valid, and even common among professionals. They are only inappropriate when they go against the scripting style a company or editor has requested. And that brings up the final point...

Find much more over at Sean's blog.