For those who are looking for ideas on how to punish a lady slave / sub, how about the use of a tack bra and panties, with more than usual tacks inserted. She would be required to wear these for as long as you feel is a reasonable punishment.
Needles can also be used depending on the degree of punishment you are dishing out.
Toys are also used inside and out for extended periods of time. Maybe the readers could add more.