Don't thump.
Don't begin to play until you are ready.
Don't count to your playing, but play to your counting.
Don't jerk your hand when you put your thumb under.
Don't play one hand after the other.
Don't play with your arms.
Don't keep the pedal down all the time.
Don't gallop over an easy part, and then stumble over a more difficult one.
Don't neglect posture when practicing.
Don't nod your head when you play an emphatic note.
Don't pass over a difficult bar until it has been mastered.
Don't be late for your lesson.
—London Musical Herald.
