we actually have had several threads on the subject both boys and girls varities

it depends of course on your current limits between you two

on the lighter side

having her go to a grocer and purchase a cucumber or a corn on the cobb and nothing else but some ky jelly for lubricant was a task i found to be adorably erotic and humiliating (i know from personal experience)

one that envolved several people was when a group of my owners buddies were in town, dressed for the clubs we pulled into a convience store in two different vehicals, everyone got out and milled in the parking lot while little ole me (looking one step away from a hooker) had to go inside in plain view while all the guys catcalled etc, and purchase two whole boxes of condums ,,,,it was especially deliciously humiliating

variations abound on the shopping trip humiliation tasks of course, the only limits are you and her's imajination,

you may even want to plumb her mind by having her write down like twenty ideas she is willing to try someday, then shelfing them for a while and modifiying them at your convience and later after she thinks nothing is coming introduce one of them as a task