The Journal of Participatory Medicine has published an editorial comment about making every second of your doctors appointment count. It is honest about the time constraints many doctors and patients find frustrating, but offers some useful advice . . . taking notes, preparing/prioritising questions, taking a friend to listen, and being proactive about follow-ups and results. This sort of advice is really important, and should be given by some doctors themselves, to help their patients make everybody's time during the appointment worthwhile.
The full editorial is here.