Here are a couple of things that have helped my writing recently:
The Snowflake Method – This is pretty much the way I write now, because it’s how I think. It is geared for writing novels, but the concepts can be used for many things.
Writing the Perfect Scene – A good article on writing scenes that keep the reader into your story.
Lester Dent Pulp Paper Master Fiction Plot – How to write a story just like the creator of Doc Savage did. This is good stuff.