my Mistress usually personally finds fitting punishments for when i am in need of one, but sometimes She has me create my own (Mistress still has to approve them).
i have some common punishments for disobedience; e.g. wearing a ball gag for talking without being spoken to first, or for not addressing Mistress by Her proper title.
On several occasions, my obedience levels are never a problem after being treated to my 'Punishment Plug.' It is a Large Doc Johnson buttplug. Its comfortable to wear, but because it is unvented, but leads to cramping eventually- which is why Mistress fills me with it and then sends me off to work.
my most recent humiliating punishment was when Mistress sent me into town to pick up a few items at the local grocery. Mistress Mel gave me a decent sized (1 quart) enema and gave me a very large buttplug to hold it in (3' diameter). In addition, i wore my posture collar and tight fitting girl's bluejeans, which showed the outline of my harness underneath.
While being followed by Mistress every step of the way, i stumbled through the store. i was humiliated every second. i kept getting weird looks, and two Gothic girls, probably in their mid 20's, approached me and asked if i was wearing a buttplug. Mistress overheard this and came over and had me explain that i was Her slave and then describe my punishment. The two girls had wide open mouths in awe before laughing at me and walking away.
my obedience level has not been an issue since.
:squigglemouth:
These are just a few ideas; i want to just illustrate that finding a punishment is none too hard in all honesty.