Related but not exactly the same thing: it becomes really, really easy to quit something once I suspect that thing is a migraine trigger, even if I had struggled with quitting it in the past. I suspect the logic goes something like, the aversiveness of a migraine at time_future so easily outweighs any possible temporary enjoyment that my brain doesn't even bother tempting me. I jokingly-wish that I could make certain things into migraine triggers.