Another also I practice scales and arpeggios about 30 mins.
Debussy Symbolism,When you are talking about the "wrong way" to practice, are you referring to the hand motions etc. or the method of practice. For hand mechanincs I try to imitate pianists I have watched and try to incorporate the motions that I have read from C. C. Chang's book. Other than that, I videotape myself. Would it be nice if I have video taped a performance and put it here for people to comment?