If It Works, Don't Touch It

The only programming advice worth taking is the one you'll find on that little strip of wisdom: "IF IT WORKS, DON'T TOUCH IT." Nothing strikes more fear into a developer's heart than having to modify code that's somehow functioning despite violating every principle of software engineering. That magical spaghetti mess held together by duct tape and prayers? Yeah, that's staying exactly as is. The moment you try to "improve" it or "refactor" it, you'll unleash chaos that'll have you explaining to your boss why the entire production system is suddenly speaking Klingon. The unwritten 11th commandment of programming: thou shalt not mess with working code.