As the others have said, keep in mind what your sub and you have discussed, also it may help to spend the time writing out on your own what may benefit the submissive to do better for her/himself within inner growth. I also advise to make the rules simple when first developing them so comprehension is easier and that no one gets confused, over time as the growth grows within the submissive to make them become more complex.

Hopefully this advice helps as well