During morning treatments, I do my hair and makeup, read my Bible, and/or pray for my students. During evening treatments, I generally grade papers. If I happen to be caught up on grading, I read a book. In many ways I've come to enjoy the enforced quiet time of treatments.
By the way, I do have to explain to my students why my handwriting sometimes looks a bit unusual on some of those papers--I suddenly have 80-year-old handwriting!