Don't stretch yourself anywhere except in your own apartment.
Don't be fidgeting or balancing upon your chair.
Don't introduce ladies to gentlemen, but gentlemen to ladies.
Don't play or sing unless invited by your hostess.
Don't be always touching people when addressing them.
Don't talk in a loud, boisterous voice.
Don't speak to any one across the room.
Don't whisper in company.
Don't boast of the big people you know to people who don't know them.
Don't make fun of any one except in the mildest form; better avoid it altogether.