I can't find the original link right now, but here's a Medium piece that is nearly the same content: https://medium.com/swlh/fobo-fear-of-better-options-is-the-r...
I try to keep my mind focused on immediate tasks and work through them in logcial steps. I try not to second guess myself once i've decided something unless it becomes apparent it was a poor decision, otherwise I try and roll with things and work out the best for whatever happens.
Because in the end, we only have so much control over things and i've wasted a lot of time overthinking and worrying about things that happened or might happen that I can't change or have no control over. I eventually realized it was pointless and making me miserable. I find by focusing on the things you can affect and, I don't really know how to word this, listen to your gut feeling or instinct about things.
Oh and mushrooms, magic mushrooms help with that.