I've usually aimed to practice one hour a day after our son goes to bed. However, since I've begun working with a demanding teacher, I find that that time (when I was tired, but just awake) seems unproductive for all but playing through sections I've already learned.
Is it better then to practice in the 20 minutes here or there during the course of the day when I would be more alert...than to practice after my work/family day is concluded?