There is no a particular practice that defines or transmit further submission or surrender. Certain actions are an emotional cost varying according to the personality of each. Some fit a simple fatal cuckolding and other costs them financially submit.
All required training and, of course, an adjustment period, but those who come to my hands know what my requirements are based on and the relationship develops from there.
For you can be overwhelming public humiliation and one of his fantasies to another. Something that somebody can be used to, it may be the biggest test of submission to other one.
Everything is very subjective, but what I value most is a slave that gives me to run a desire I have expressed or he had anticipated and not be easy. The effort to please generates a great pleasure to me.