Another best practice would be to have a list of meds, though I can't imagine anyone not having that handy.
I'm kind of reaching here:
Passwords for whatever medical portal(s) contains one's medical chart type info.
Name, email, phone info for primary Doc and specialists (like cardiologists, etc).
App for doing e-Med visit with one's physician while on the road. I had to do that once. Because it was my first time using the app, there was a lot of fumbling around.