1. They always proofread their work several times over.
Even when they did, they usually only did it once, and subsequently turned in papers with tons of errors. This amazed me, as I literally felt a compulsion to read my work several times over. Indeed, I had a fairly concrete process. I would write, proofread, sleep on it, read it again, and then read it aloud. Is that overkill? Possibly, but it led to many great papers!