Impose some positions she must assume. Some will make her feel submissive and good, some will put her in the mood for sex, for play, mindful and expectant for discipline/punishment... and some will remind her how she has displeased you. (It's an amusing pasttime regardless which I heartily endorse. I make my submissive practice positions nightly. For online play, it puts me squarely in their mind. For real life, it puts them in a position for my physical pleasure... whether it's to be play, discipline, punishment, or plain old-fashioned hard sex.)

Some positions, additionally, will be very difficult for her to maintain. There are some which strain the muscles after mere moments. Those are good as punishing time-outs.

Then there is the fact that punishments such as flogging, single-whips, and even the cane, can become excruciating without being physically damaging... for example, think triple-digit floggings. It's time consuming but may pay off dividends once angel realizes you're willing to spend the time to do it.