Hi, Emily.
I can understand your question. Before I was able to enjoy time with a true submissive I wasn't sure what to expect myself. Ultimately, though, there are really no rules except those that your Master/Mistress and you agree to. It all comes down to what type of relationship you are looking for. I prefer a true D/s relationship, which is much more than tasks or punishments. I believe strongly in providing a submissive an environment of submission in which she can work. Of course you have consequences for mistakes or failure, but the true goal is to encourage the submissive to want to be obedient.
My current submissive wakes each morning to read her set of rules on her knees in a proper submissive position. The rules really define her attitude rather than her tasks. They include how to address me (always as "Sir"), positions to take on command (kneel, present and present down), how to dress, how to groom and controls on actions (such as a command for "eyes down", walking 3 feet behind me at all times, etc.).
Specific goals are also in place for her, including corset training or proper clothing to wear, but we realize this is a work in progress and takes time to adopt.
Ultimately, I expect my submissive to treat me with respect, but I also want to treat her with respect in return. I love her for her gift to me, namely her submission, and she loves me for her consistency and my sense of control. That, I feel, is the key to a successful D/s relationship.
TS