Those are some great suggestions and must reads for anyone gathering intel on the ground. I never had a chance to go to any advance schools for intel while I was in but what helped me in my gathering experience is knowing the personality of a person. Most people love to talk and as I would listen I would identify that persons personality type and work within that to "collect" the information I needed. Resources that helped me identify this were;
Dr Robert Rohm - Positive Personality Profiles,
http://www.personalityinsights.com/
Florence Littauer - Personality Plus
Dale Carnegie - How to Win Friends and Influence People
Gary Chapman - The Five Love Languages
Not only did I do a better job "collecting" information I had a better understanding of my personal relationships with family and friends.
my 0.002 cents!
