The first book I'm going to read in 2012 is The Checklist Manifesto by Atul Gawande.
My reason for choosing this book to read first: Physiology.
Now, I was already planning on reading this book. But it became top priority on my list because I need to finish Professional Development for Physiology ASAP -- and this book counts for it. I've started Complications, another book of Gawande's, and I've really enjoyed it so far. So I think I'm going to thoroughly enjoy this one. So hopefully I'll get a post up here soon telling you all what I thought of it!