We also use a white board. My DW with early stage AZ actually suggested it. We go over the day's activities every morning and add them to the white board. She still is forgetful and often repeats questions. It no longer irritates me; I just calmly answer her question. Whenever I get irritated with her and snap, I stop, forgive myself and choose a better response. I'm working on responding rather than reacting. That takes patience and learning to pause before opening my mouth.