Interesting topic and a great read so far. I think going back to the original post and subsequent lists, there my be an overarching principal at play. Let's take riding/driving home when we just have a few more miles to cover as an example. As most data would suggest, that's when the majority of crashes occur (some estimate close to 70%). The main reason listed is that we switch to auto-pilot because it's familiar ground, and/or we've done it so many times that we assume all will be as it always has been, aka complacency. Guilty as charged.
Let's assume an action is required to avoid a crash in the above scenario; do I need my visual skills, "spidy-sense," earplugs, or would knowing how to counter-steer a bike without much thought help me overcome it? Or is it any of the other skills matched for the moment? In this case, does it matter which skill sets have been practiced until second nature? If my mind isn't in the arena, can they make a difference?
Could this suggests it's possibly knowing what we ultimately want - to get home in one piece(?) - and if so, what skills do we need in order to make that happen?
Is the first critical skill to remember to treat every piece of tarmac (or dirt;) the same?