Ryokan's rules

Take care not to:
talk too much
talk too fast
talk without being asked to
talk gratuitously
talk with your hands
talk about worldly affairs
take back rudely
argue
smile condescendingly at others' words
use elegant expressions
boast
avoid speaking directly
speak with a knowing air
jump from topic to topic
use fancy words
speak of past events that cannot be changed
speak like a pedant
avoid direct questions
speak ill of others
speak grandly of enlightenment
carry on while drunk
speak in an obnoxious manner
yell at children
make up fantastic stories
speak while angry
name-drop
ignore people to whom you are speaking
speak sanctimoniously of gods and buddhas
use sugary speech
use flattering speech
speak of things of which you have no knowledge
monopolize the conversation

~ from Ryokan's Dewdrops On a Lotus Leaf
(translated by John Stevens)