What I do
I take artwork from "the customer sent a file" to "the press can run it": the right size, bleed and trim, CMYK, outlined type, a resolution that holds at the finished size, and a proof the customer has actually approved. For a trade print shop that is the difference between a clean run and a reprint.
The same discipline runs through everything I run: a design studio that builds brands and keeps them consistent, a print desk that quotes the same day, and software that records who approved what.