@PokeDadInTraining asks
cat keeps laying on the binder while I sort. Adorable but probably not part of the process?
Jeff answers
I'd give the helper a nearby empty box and keep the open cards in a separate workspace. Put everything away when you step out, even briefly. Fur is an inconvenience; claws and spills can be a bigger problem. You can enjoy the company without leaving the collection exposed.
— Jeff, infinitepulls.com