personally i tink worry helps like rumination.

DaVinci observed birds - deeply. We can still learn from the birds today. By looking at a photo of a penguin surfacing with 100 feet of bubbles behind him like a rocket it was discovered the bubbles reduced the drag of the water. Now ships use this fact. Torpedoes now go 80 mph with bubble technology. I can go on with bubbles for an hour but the point is to look deeply. The more knowledge and connections we make, the more neurons and connections we make in an upward growing spiral.

Rule number 2: Allow even unrelated ideas or irrelevant notions to surface, they may be of help later. While studying bubbles the framework of a cube allowed bubbles to combine to create the dimensions of a hypercube. It is unrelated but worth noting.