Insight, intuition, making faster decisions, I’m a junkie for that kind of stuff.
Here’s some great advice on when to use intuition.
The distinction between a puzzle (which is soluble, has an answer) and a mystery (which may never be answerable) is a good one; mystery you use intuition (just ask Miss Marple, Sherlock and Hercule Poirot), puzzle you can go at logically. There’s way more in there.
More on intuition and decision-making in these posts: