Something I have considered recently is listening to material that you may have a passing relationship with, but keep on hand knowing that it is "important". I have a few such recordings, of superb performances which have been recorded beautifully by people in the know. Recently, as I've been acquainting myself with a CD player bought the other day, I have put on a couple of the CDs. At times, the result has been nearly startling as I realize that yes, indeed, these are truly important and beautiful recordings.