The Builder's Trap
It took me a long time to realise that my job, as an engineer, wasn't to build. It was to solve problems. And the best path is often "use someone else's solution". I'm definitely better but it's still a work in progress to get it to be my first thought in all cases.
Pat's 3 things to do to avoid the trap are great. They each pull at the other, which drives honesty & ownership.