These are some of my favourite posts on writing and publishing.
Anything by Tobias Buckell is good reading. He recently launched a page for his blog posts on writing, and his Best of Site list has such gems as Survey results: how many novels did you write before selling one?; A response about writing characters of different racial backgrounds; and How I write a novel.
Junot Diaz talks about Becoming a Writer. It took him ten years to produce the Pulitzer Prize-winning The Brief Wondrous Life of Oscar Wao.
John Scalzi backs up Buckell’s research and adds a bit more info in the post Why New Novelists Are Kinda Old, or, Hey, Publishing is Slow.