Strunk and White - 50 Years of Simplicity as Style
online.wsj.com
online.wsj.com
http://chronicle.com/article/50-Years-of-Stupid-Grammar/2549...
which does much to explain why I don't follow Strunk and White point by point when doing careful editing.
Link to HN thread about Pullum's article, including suggestions of sources of better writing advice: