I know there are dozens of links out there. I know that some of this is context specific. With that out of the way, for those of you who are preparing manuscripts, looking for agents, publishers, etc, here's Ursula k le Guin on Manuscript Preparation and Contracts.
Irregular visitors to her site will be happy to know that it's more navigable now. Earthsea now has maps!*
*I meant that figuratively, but as it happens there are maps there.