Ted Bradshaw, one of the very talented artists here at Rockstar pointed this Web site out to me.
What a load of great information, put in a way that is instantly digestible.
Take a look. Y'all won't regret it (me, I'm all tangled up in the section about "intelligent distribution of detail," not all over, but smart-like (like I almost never do)) ...
The title is a link, but you can also go here.