There are lots of options. Subarama has mentioned some, but there are lots. Perhaps you could start your play with her stripping naked and doing some domestic chores while you relax and ogle her. She cleans until you feel you need to use her. That way she earns being tied up and worked on.
Or train her in slave positions. That way the focus is on her doing something and you judging her.
Or give her an assignment during a play and reward and discipline her for how well she does. For example, if you're spanking her, require that she doesn't make any noise at all. If she makes noise, discipline her somehow, but if she doesn't, reward her. And if you really want to discipline her, make sure that she makes noise.
Or give her a training goal to work toward--kneeling motionless for 5 minutes, for example.
Or start play with her doing a striptease for you, complete with music. Tell her that she's not allowed to show tits or pussy for 5 minutes, and if you don't think she did a good enough job, you're going to discipline her.
Or do a role-play scene where she has a character to perform. You're a burglar who broke into the apartment and she's a victim who has to try and talk you out of raping her.
And there's always the basics--I'm gonna watch the football game while you give me a blow job, bitch
