Be honest. Tell us what you don't like as well as what you do.
Use active verbs.
Second-guess every adverb and adjective. (From "Theory and Practice of Editing New Yorker Articles," by Wolcott Gibbs, vintage 1930s, point No. 1: "Writers always use too damn many adverbs. On one page recently I found eleven modifying the verb 'said.' 'He said morosely, violently, eloquently, so on.' Editorial theory should probably be that a writer who can't make his context indicate the way his character is talking ought to be in another line of work. Anyway, it is impossible for a character to go through all these emotional states one after the other. Lon Chaney might be able to do it, but he is dead.")
Include a scorecard.