One of the smartest engineers I've encountered in my 27 year career advised me to strive to do "the simplest thing that could possibly work" - not just to get unblocked on something new, but as a guiding principle. It resonated (and goes beyond "KISS", for me), and IME is real wisdom.

That’s a slogan from Extreme Programming! Coined by Ron Jeffries, I think, along with YAGNI (You Aren’t Gonna Need It), as a way of reminding people not to overengineer for features that in the plan.