Double bassist and blogger Joe Lewis wrote a post yesterday that raised some very good questions. He writes: I’ve often thought much about efficiency when practicing music. I used to park myself in a practice room from dawn until midnight back at NEC and even before then. I would break my practice routines down into 15 minute increments, and have it all laid out on a schedule. Practice would occur for anywhere from 4 to 12 hours per day, including breaks of course. I was nuts, and...