Someone to whom you can make the following, urgent request, even if they’re in the middle of an important business meeting involving people scattered across 3 different countries:

“Hi, it’s me. I’m calling because I need you to tell me that just because the active, throbbing joint pain of the last 3 days seems to be gone for the moment, that does NOT mean that it is time for me to get dressed and drive 15 miles up the highway to the bookstore, simply because they just emailed me a coupon for 30% off of one item.”