Write code as if it were going to be part of a library

Better code is correct, efficient, and reusable. As an industry we produce so much code that is a one-off. It is such a waste of time and talent. I try to encourage every developer to write all code as if it were going to be part of a library, ideally part of the standard, and to use library components. - Sean Parent on https://www.meetingcpp.com