Hi!
I stumbled upon this thing: https://plus.google.com/100235234777467 ... 2c8kwEfZpw
Essentially, some designers wrote guidelines for running and playing OSR games. This is an excellent document that gets to the core of what old school roleplaying means.
Since we all here plan to run such a game in the future, it might be of interest for everyone to read and understand these principles. Hope some people find it useful!