Today’s tip comes courtesy of my old teacher Dr. Andersen and also Dr. Irene Peery-Fox. When playing a piece, always go slow enough that the notes, expression (dynamics), rhythm, and fingering are always correct. To make those elements easier to remember, just remember the acronym NERF or FERN, whichever you prefer. As you play slow enough it may seem tedious in the beginning, but in the end you don’t have to re-practice sections where you learned in mistakes from practicing too fast. Speed comes naturally.