My appointments feel like they come round once in a blue moon, so preparing for them well is key to not stressing for the next how-ever-many months! The US Agency for Healthcare Research and Quality (part of Department of Health and Human Services) has developed a really helpful website and on-line tool to help patients prepare for medical appointments.
Very aptly, the website has the heading "Questions are the answer".
They have a question builder app which suggests questions related to topics that you want addressed in the appointment. Stories from clinicians and patients are also included (see here), which is great, as I feel very strongly that stories are excellent ways to convey healthcare messages.
An excellent resource to help patients self-manage!