Below are some web pages about critiquing:
http://www.sfwa.org/2009/06/critiqui...kshop-context/
http://www.crayne.com/howcrit.html
http://www.crayne.com/articles/succeed.htm
http://www.therthdimension.org/Ficti...critiquing.htm
http://critters.org/c/text.cgi?f=tips.asterling.txt
http://critters.org/c/lib.ht
I have read most of these, and the advice is good.