Two posts on the RUNCODHIT blog about Defending Bunch Formations and more info on the TCU coverage package vs. 3x1 sets.
A post from Brophy's blog about offensive game planning philosophy from Brian Billick. Always good to glean something about how the other side is thinking. I believe defensive breakdown and game plan for offensive openers (game, 2nd half, and of drives) is an under used planning opportunity for defenses.
And a book I just finished reading Outliers: The Story of Success by Malcolm Gladwell. The book explores why people succeed and is a fascinating easy read.