Each reminder is geofenced to the business it's attached to. Thus, when I get within the vicinity of any of the businesses in that list, it shows me the reminder. Kind of like a Rolodex. It doubles as a flash card of sorts when I don't patron the business that day.
I don't depend on it as much these days as this simply existing helped me get better at name recall, but it was immensely helpful when I created it.
Extend hand for a handshake. Hey, I'm [name]. We've met before but it's been a while.
First, it lets the other person off the hook, because they're almost certainly experiencing the same momentary anxiousness. Second, literally every time I've done this, they've replied like "Hi, nice to talk to you again! And I'm [name]."