My guiding principles after 20 years of programming (medium.com)

This is a quite good list of recommendations!

I have one principle, after over 30 years of programming and a decade in "Software Archeology": Consider the poor sod who will have to deal with your work in 30 years.

Pretty much matches my experience (I've been an active programmer for nearly 40 years and still spend significant portion of my time writing code).