Those were not programming tricks, but computing tricks or command line/sql tricks.

Anyways I find it mind boggling how many useful actions are not known by „normal people”. Most people are really using computers in a very inefficient way.

My idea is if we would spend time making people learn computers or software they use daily better - we wouldn’t need AI agents and we would triple GDP.

Maybe, but there's all sorts of habits and skills that would make us enormously more productive/healthy/etc. if only the masses would learn them. This is a very old problem.