Just responding to this: fooling your mind is not hard. Even very rational, skeptical minds engage in self deception all the time. Our minds are so unbelievably malleable. We are all wired to be prone to biases and unexamined schemas. These just look different for rational types.
On the other hand, it is possible to achieve results by not fooling your mind, but simply by reframing one's own thoughts. This is the basis of cognitive behavioral therapy (CBT), which works very well in helping manage negative feedback loops.
Often times our negative emotions are caused by feedback loops, therefore it stands to reason that we need a method to moderate these overactive loops. CBT is one of a few approaches that have been shown to work well for a significant number of people (nothing works 100% of course).
Guy Winch alludes to this in a TED Talk (I think TED talks are oversimplifications, but this one does present some good salient points about emotional hygiene and loneliness which I have found to be helpful in my own life)
https://www.ted.com/talks/guy_winch_the_case_for_emotional_h...
Who is this entity that is reframing the your thoughts. Is it also not you? This is some sort of psychotic thinking to divide yourself into many parts, one part passing judgments and rulings on the other. This sort of thinking of is at the root of why we are so conflicted and full of suffering. This just perpetuates that style of thinking without examining why we are so divided in the first place.
The practice (IMO) isn't to break the loop as much as it is to see the loop. And to see it while it's happening/during triggers.
Sure you can come up with various philosophies like stoicism, Buddhism ect but you are merely trading one loop of seeking for another. Now you are stuck in a 'non-seeking' loop and failure to achieve 'non-seeking'.