I once came across a study that suggested the possibility of training synesthesia and its potential to improve problem-solving. I then created a system in which each number and letter (from 0-26 and .,a,b,c...z) is associated with a color, an object, a scene, an animal, a shape, a position on 3x3x3 cube, a body part, etc. and I trained with it.

For example:

0, ".", grey, stone, mountain landscape, wolf, irregular shape, beard

1, "a", red, fire, burning forest, bull, square, penis

2, "b", blue, water, ocean, whale, circle, breast

Now, I visualize a blue water cell working and growing when I do bench presses.

Looking back, it might seem somewhat autistic, but it makes my daily life (especially mundane tasks) more interesting, as sometimes images randomly pop up. I believe such a system might greatly enhance the ability to generate new ideas.