These days it can be so difficult to get a doctor's appointment, you best be prepared when your turn finally comes to see your physician.
Before the appointment: Make a list of questions you have for your doctor. Don't rely on your memory; actually write the list down. Chances are high that the visit with your doctor will be brief and a bit hurried, so if your questions are written down, you won't forget them due to the weird stress that can accompany your appointment. Also write down all medications and supplements you are taking. These too can slip your mind and you might need to discuss them with your doc.
After the appointment: If your physician gives you any specific recommendations or instructions, use your cell phone and leave yourself a voice mail message with the details. It is best to keep track of the information while it is still fresh in your brain. If you can write notes, even better. Just don't lose the paper!