Online Writing Lab at Purdue University
Purdue University Owl: General Writing Resources
This helpful resource details the process of writing, including how to plan, write, and revise. Content also includes the different types or genres of writing, and exercises in grammar and mechanics.
Other
Brain dance.com: Three Step Creative Writing Process
This process seems very involved, but there are good ideas for getting started on your creative writing if you're stuck at the brainstorming stage.