This is not scientific and is only from my own observations.

My left brain had a habit of freaking my right brain out. The left language part of my brain would go "OMG! what if this shit happens!!!". My right brain would then freak out by sending my emotions intensely negative. This in turn would make me think more of the worst happening.

My solution was to act like I was in total control of my emotions. I would shut up my left brain and feel feelings that were appropriate for the situation. Feeling centered is a good one. I do that by thinking of something that I have no emotional attachment to like a paper cup or paperclip. I focus on that object and ask myself how I feel about it. This puts me in a chilled out shrug of the shoulders mood.

Personally if I had to put up with that crap all the time I would just bail from taking it.