I just discovered this amazing thing. Editors at Carina press pass along their comments on the slush pile to @angelajames. Angela posts them anonymously on twitter at #editreport ( I don't tweet so hopefully that makes sense). She also posts them on a website here. That link will take you to the December report.
This was amazing. Reading these thoughts was enlightening and terrifying. I HIGHLY recommend checking it out just to see how editors react. And yes there are good examples at the end. I know there are a few things I'll be checking my manuscript for now.