As you begin to transition from scanning on paper to scanning ex tempore, you will doubtless feel daunted by the task. But remember, even the Robert Sonkowskys of the world had to start somewhere.

It is better to read mechanically at first, just to get a sense of the rhythm. In time, the ear becomes more discerning, and one's readings become more sensitive and sophisticated. The key, of course, is practice.

Labor omnia vicit (Vergil, Georgics 1.145).