
Ignore amateur bloggers and learn from a pro! Wikipedia has
Kurt Vonnegut's 8 Rules for Short Story Writing.

The Editorial Ass has a checklist of
Positive Attributes that The Perfect Author Possesses. (Note: Almost all of them have to do with unabashed editor-appreciation.)
Via.

This one's for the soon-to-be-bankrupt self-publishers who wouldn't take the hint that their book wasn't ready for publication: How to Craft a Book Cover --
Front &
Back.

The Writer's Relief Blog has put together a lengthy list of
The Crap that Literary Agents Don't Want to Read in Your Query Letter. I'll add another one: Absolutely everything found in the 2nd sample query letter found
here.