This made me think, great!
As for "easy" decisions that impact anything positively I think there are very few, the right decision has always been complex and hard, and whenever I cut corners in any way it has led to negative stuff...
There are of course moments in time that led to enormous change, where I just YOLO-ed it. Those moments always arose from intuition and gut feeling, so they are not really the same as a rational decision.
That being said I am certain that those had a lot of subconscious, very complex decisions and facts that were invisible at the moment. Often I can see in retrospect what these were, in some cases decades later :-)