An interesting undercurrent in some kink dynamics is one of record keeping. When managing a submissive, it might help to keep at least some notes: the things that they like, the things they don't, and a few notable connections they might have built with others that you can build upon.
Natural skill may allow you to flow around them, pulling on their strings and manipulating them as you please, but true dominance of a subject requires at least a little bit of observation and planning. Commitment to a plan often requires writing it down, so that you don't forget the direction you have chosen to travel in the middle of your journey: you might still detour if an attraction presents itself but in general, planning may assist you in preventing accidentally cementing things in your submissives that you may have to train out of them.
And thus the solution: record keeping. A little book of secrets presents an alluring target for a brat, and convinces more obedient submissives that you are serious about your desires for them. A dominant that keeps notes is a dominant who can build an air of mystique: 'what does She write in that little book?' 'it is about me?' 'what has She planned for me?' and so on.
For an additional bit of fun, have your submissive write their own notes to you: their own thoughts about the play you are doing, and logging their own desires and ideas. In these little reports you can learn more about them too, and what they hope to get from you. They will provide you with all the information you need to manipulate them to your heart's content. Review them whenever you are in need of inspiration, and you will find that all you need to know is always within your grasp.