I've often womdered about this myself. And have found that most people follow it in different ways.
In the past, I have structured my practice with charts and tracking. lately, I have come to just concentrate on a single approach. I will apply this to tunes and practice it very slowly as well (long tones/meditation). Then apply the same approach to improve/ear training and all of this leads to playing with others (a few nights a week).
I spend a small amount of time on piano; not nearly enough.
In the past, I have structured my practice with charts and tracking. lately, I have come to just concentrate on a single approach. I will apply this to tunes and practice it very slowly as well (long tones/meditation). Then apply the same approach to improve/ear training and all of this leads to playing with others (a few nights a week).
I spend a small amount of time on piano; not nearly enough.