Good programming advice from non-programmers

Answer 1

K.I.S.S principle (Although I suppose it is along the lines of DRY / DIE)

A few more which complement this principle (might be the other way around).

Everything should be made as simple as possible, but no simpler - Albert Einstein

Simplicity is the ultimate sophistication - Leonardo Da Vinci

It seems that perfection is reached not when there is nothing left to add, but when there is nothing left to take away - Antoine de Saint Exupéry

Simplicity is the final achievement. After one has played a vast quantity of notes and more notes, it is simplicity that emerges as the crowning reward of art. - Frederic Chopin