Most people will answer this question by citing the usual suspects-- Wall Street Journal, The Economist
As I have done SC problems, I have consistently scored between 95-100%, despite knowing only a few rules of SWE.
My secret? I was a college Literature major, and I spent four years reading literary criticism. Unlike news stories, which are written by journalists, literary criticism is written by a bunch of highfalutin English professors with nothing better to do than try to impress their peers with perfect syntax.
And when you get through this, get a copy of the New York Times Book Review.
Also online at http://www.nytimes.com/pages/books/
Just my two cents.