Defend University - nice site

I recommend looking at Defend University. Almost all the articles on it are excellent, and they have a great blog, too (http://www.defenduniversity.blogspot.com/). Focus is on DT/law enforcement and military, but also straight-up self-defense.

Defend University is a research and development group dedicated to the exploration of leading edge techniques and strategies for self-defense, security and defensive tactics. Look here for info that can be applied to your personal protection, defensive tactics, executive protection, and martial arts programs.