JP,
Doug made a 3 part series of this subject starting in the last issue of AW's 07 magazine, then on to 08. It is highly valuable reading. He included these 3 articles, in addition to many more in his new book Whitewater Philosphy, which I'm midway into and thoroughly enjoying. You can buy it at
www.dougammons.com. I've never met the guy but I enjoy his writing.
Cheers,
Rob G