[Question] What advice do you have for someone struggling to detach their grim-o-meter?

From detach the grim-o-meter:

[S]top calibrating it against the state of the world. That’s a terrible plan!

The quote, and the rest of the essay, seem to imply that once someone notices that their grim-o-meter is connected to the state of the whole world, they can detach it on command. Personally, I’m having some trouble, and I imagine others are too, so I’m asking the community: What advice do you have for someone struggling to detach their grim-o-meter?