It's not luck by Eli Goldratt. Where he introduces the logical thinking processes he used to develop his theory of constraints. It was graphs (links and nodes) to structure our reasoning.

Then if you like it go to: The logical thinking processes; A systems approach to complex problem solving by Dettmer.

And finally if you need to improve not only you thinking but that of a group in an open discussion go to: Dialog Mapping by Cocklin