Here is presented a paper largely focusing on technical, rather than everday, heuristics.
Heuristics, the art of problem solving
Memorization comes before understanding!
Here are presented a few papers on a techniques of mathematical manipulation
I refer to as virtual emplacement.
Fireside treatise on virtual emplacement, part 1
Fireside treatise on virtual emplacement, part 2
The How of Mathematics and Physics This article includes some history of how
Willard Gibbs developed important aspects of thermodynamics, such the
equation dU = TdS - PdV.
Motivated Solution to the Cubic Equation