Keep the shape of her day.
The same wake-up, the same chair, meals at the same time. Familiar order does more for her than any reminder system, and it makes a new person easier to accept.
Introduce people slowly.
One new face, in daylight, with you there, doing something ordinary like making lunch. Say who they are and why they are here, and expect to say it again. Consistency matters more here than anywhere else in care.
Plan for the hard hours.
Late afternoon and evening are often harder. Put the calmer activities, the lower light and the familiar music there, and put appointments and errands in the morning.
Safety without taking over.
Look at the stove, the front door, the stairs and the car. Change the risk rather than the person: a kettle that switches itself off, a lock she can still use, a light that comes on by itself.
Do not correct, redirect.
Arguing with a wrong memory costs you both something. Agree with the feeling, then move to the next thing. Ask any provider how they are trained to handle that moment.