Stephen King has a very simple formula for learning to write well: "Read four hours a day and write four hours a day. If you cannot find the time for that, you can't expect to become a good writer."
I'm currently reading Misery (which, you may be interested to know, was intended to be a Richard Bachman novel until the whole Bachman/King thing was uncovered) and I'm finding it hard not to see Kathy Bates in my mind as Annie Wilkes. I've only ever seen the film adaptation once on its initial release, and whilst it is one of the best King movie adaptations, I prefer to enjoy King's books without preconceived images of characters or scenes. Unfortunately, Kathy Bates's association with the role is so deeply ingrained in the public consciousness that it's hard to shake off. Never mind.
I'm also reading James Herbert's The Fog and finding a world of difference between the styles of Herbert and King, not least in the level of characterisation - 'nuff said.