User blog comment:PixCity/Tips on Posting Proper Reviews?/@comment-24101790-20161019140719

A tip I can give would be to cite examples. If you say the story has clunky wording, copy/paste an instance of it ("He was never not by himself except when he was."). If you want to praise the way they handled a scene or character development, use an example or describe the scene. Having concrete sections they/other people reading can refer to really adds credibility to a review and lets people know what they're doing right/what they need to improve on.