Waldo Emerson Comparisons can clog up writing as badly as alliterations and cliches. Avoid redundancy and verbosity, or readers will think you are repeating yourself and using too many words as well besides. Clear, specific writing beats vagueness, we suppose. Overstatement totally destroys any credibility you ever had forever. Understatement can, at times, perhaps shade a point to the point of its fading away.
Analogies work about as well as fur on a flounder.
Pick verbs that do something. Even if a mixed metaphor sings, you should derail it. Its distrakting too punctuat, an spel rong.