The reason so many of us lose our bearings about practising early in life is that we practice in living rooms with other family members in earshot - and healthy practice would simply sound too obnoxious, intrusive, repetitious and unmusical for others to hear without annoyance.
William WestneyDon't attribute mishaps to a lapse in concentration - if you missed the note you don't know it.
William WestneyIf you have played "six times wrong, one time right" the problem is not quite corrected.
William Westney