I'm not sure if this is a rule but I keep this bit of the Serenity Prayer in mind:

"Grant me the serenity
to accept the things I cannot change;
courage to change the things I can;
and wisdom to know the difference. "

Jaz, when does that come to find for you?

Yeah, Jaz. Quit being elusive, man. Tell the story.

:bg:

And what happens after that prayer comes to mind?

I think this qualifies: My day job often involves construction or repair of objects I've never previously worked on, which can be both stimulating and nerve wracking. This past week I've noticed that when on such construction jobs, my inner world involves an ongoing "dialog" of this sort:

"1] Aw, geez, I've never done _____ before - what have I gotten myself into? 2] Wait a minute, _______, while new in total, is composed of parts that will need only existing resources (skills and tools); 3] Past jobs, which were also similarly new, were successfully completed; 4] Odds on this one look pretty good."