How do I be more domme?

So my guy wants me to be more domme but I only have experience being a sub so I dont really know what to do other than what he does to me. Usually he does things like biting, choking, hair pulling, and sometimes he'll hold my breath. I think I would be fine doing these things to him but I don't want to seem like I'm just copying him. I normally will bite and sometimes scratch and he's into that but I don't know what else to do, he's not into whipping, shocking or anal stuff either, so that's out. Anyone have any suggestions on other ways I can be more domme, or should I just start mimicking what he does to me?