I like the idea of best-case scenario thinking to counter the catastrophizing.

Catastrophizing is super common. It makes sense to an extent, if you think about evolution. It makes sense for our brains to prepare us for danger by going through different scenarios. But in the modern world, most of our brains kick into overdrive trying to protect us, which can be debilitating.

One thing I talk to my therapy clients about is looking at it like a fire drill.

When you were in school, how often did you have fire drills? Once every few months, or 15 times a day?

That's how catastrophizing works. Occasionally think of what would happen if shit hit the fan, then come up with a solid solution in case (like with a fire drill).

But going over it again and again every day isn't helpful. "But what if there's a fire!?" You've already thought of a solution. Spending more time worrying won't change the solution you've already come up with--so remind yourself you're prepared.

Because that's all your brain is trying to do--prepare you so you can survive.

It takes practice, but it's powerful.