I found this at the 3D animation forum I spend a lot of time at and even though it does apply more to animation the artistic techniques discussed and the letter in general might be of interest to some of you.
Via "Letters of Note" (http://www.lettersofnote.com/2010/01/your-pal-john-k.html)
;)
John Kricfalusi has a blog. There quite a few useful tips and helpful tips that animators used to use strewn throughout. He's kind of temperamental and most of the people that read the blog like semi-worship him, so if you go... try to choose your battles.
http://johnkstuff.blogspot.com/ (http://johnkstuff.blogspot.com/)