If you are willing to sift through the ads to find the content, this site is actually pretty good. There are a few nice articles here.
This essay on the elements of fiction is okay, if a little safe. A good crash course, but it may leave an experienced writer a little dry. This site also has a tutorial on poetry, but I haven't read it.
These tips are a little bit simple for my tastes, but they're all I could find in my bookmarks on non-fiction, so, unfortunately, they're going up. This link will most likely be removed as our links section grows.
An exhaustive list of poetry forms and terms with links to articles on each one.
While the web-design of this site gives me a headache, it's got a huge amount of information. Alongside some great resources, Poets Union Inc. also organise poetry tours around regional NSW, and have an exhaustive list of the poetry events held in Australia.