An odd theme:
[Fred] Astaire was famous for practicing his steps over and over until he didn't have to think about them. I read somewhere that his test was, while dancing, to read a book. If he could read the book and retain what he read, then he knew he had learned the dance.
[Franz Liszt] advised his students to read a book while practicing: "The advantage of reading a book while practicing for pure technique alone is that it enables us to forget the boredom of playing a passage over and over again, a dozen, or fifty or a hundred times until the body has absorbed it."
However, this is the opposite of deliberate practice.