I always have a small to medium sized notebook in my shoulder bag ... It is relatively empty or has email data or website data, or a book recommendation or some other trivia for job, for eg: phone numbers ...
Yet for some reason, I prefer napkins for my editorial art !
Do not ask me why ... Perhaps, because I am a Fan of French artist, Toulouse who drew cabaret ladies of the night on cocktail napkins !
I am doing this for years ...
Note: I do not do this at home, only for professional work at restaurants, cafés, bistros, bars and taverns ...
Have lovely day,