I like the poker analogy, It is very similar to my views.

I read a lot of stoicism and have two things I always come back to, first is a quote and then a visualising exercise.

My quote which I believe they use in AA meetings:
'Give me the serenity accept that which I can not change,
the courage to change the things the things I can
and the wisdom to know the difference.'


Then my visualising exercise is hard to to articulate but I will try briefly:
close your eyes and picture a vast endless ocean, Imagine life is just you and everybody else floating around in the middle of this ocean, mostly the water will be calm, however you have no way of knowing when the waves will come, or how bad the storm will be and how long it will last.
Therefore your only choice is to prepare the best you can when the sea is calm and hold on and ride through the storms when they hit. Everybody floating in the ocean will be hit by the same storm but their mindset and preparation will affect how they come through it.