I think being an editor really helped me take other people's notes on my writing. I'd get a note like 'It's too wet' or 'The first couple chapters are good, but then the rest of the pages were so wet that they were completely illegible' or 'Did you dip this in Sprite? This smells like Sprite. Why would you dip your novel in Sprite?' And instead of pushing back, I'd listen. That's an incredibly important skill for a young writer to have.