When you find a club you can lean on - stick with it. Good memories bring about good karma. Kinda like that one hole at your club that suits your eye, just sets up well, and you expect to play it well because you've typically played it well in the past.
Confidence means everything. Heart rate goes down, less tension, we expect par or better on those favorite holes.
Same concept applies to the tools of the trade. Back when I was a competitive player, I never carried a club in my bag that I felt I couldn't hit reasonably well less than 7/10 times. I miss those days, for sure, but that was my mindset as it related to equipment.
Even though I'm much less competitive today, that same concept has never changed.