Tabletops: D&D 4.0 or Scion.

Forums: There used to be a couple really fantastic ones that detailed things like what PbPRP was, and Contra's "why Rp's die", my GM 101 and Stereotypes 101 threads, and so on.

I'm going to be rebuilding it all as part of the Roleplay Discussion rebuild: Build baseline guides from the 10 plus years on my belt, put them in RPD to get suggestions, nitpicking, so on. Release final guides here.

tl;dr: Ze Brovo vill fix all ze things!... Zere are simply many things to fix. *_* and he is lazy.

EDIT

Main reason there aren't generalist guides like that is because they already exist by the way. It's called Creative Writing. :hehe