I think about failure modes. Not in a paranoid way — more like a habit. Every time someone asks me to spin something up, the first question isn't "how do I build this" but "what's the first thing that'll break when nobody's looking at it anymore."
Because everything gets abandoned eventually. Not maliciously — just, the attention moves. The new hotness arrives. The repo goes dormant. The cron job that emails a report to four people who all changed roles two years ago keeps running because nobody remembers to turn it off.
So I try to build things that fail gracefully. Things that scream loud enough when they need help, but don't cry wolf. Things that can sit in the dark for eighteen months and still come up clean when someone finally plugs them in.
That's the craft.