I am looking for some new disciplines for my Sub that do not involve corporate punishment and are not anything sickening if some masters would allow there subs to reply to this or other masters with any ideas could help it would be much appreciated.
Standing in corner, or standing or even sitting alone in a dark closet or small room.
Writing lines which can be made more difficult by alternating colors while writing or adding multiple lines for every line with a mistake any number of things.
Writing an essay on what she did wrong, why she did it, what she will do in the future to avoid making the mistake again.
For a mental punishment what you want to try or what I like to try and do is mentally turn her back in on herself make her look at what she did wrong, why she did it, look closely at that and analyze, its uncomfortable and unpleasant for anyone to admit their shortcomings more so when its a scenario thats based on following instructions.
feel free to experiment and modify what I suggested as well
Things like holding a bar of soap in the mouth (which is physically unpleasant but far more mentally unpleasant as being a childish punishment especially if its for childish behavior)