I think the easiest way to make an immediate change is to never call/talk to, or about it, as you would a person.
I dont use LLMs at all, but my wife does an i always correct her to say "It said..." when she tells me "He said..." every time she uses it instead of google to get an answer. (And then tell her to find me a trusted website that backs up the LLM as well)
Dehuminise it so theres always a part of your brain treating it as a machine/device, not a person you can trust.
Its like saying "my car broke down, she isnt feeling well".
The car broke down, it needs a part, do i trust my car? Usually but i wont be suprised if it doesnt work some times.
And i dont expect it to be able to swim if i try make it instead of using the vehicle i should have been using.