No sentence fragments. It behooves us to avoid archaisms. Also, avoid awkward, affected, and allusive alliteration. Don't use no double negatives. Avoid commas, that are not necessary.
Verbs has to agree with their subjects.
Avoid trendy locutions that sound flaky. Writing carefully, dangling participles should not be used. Never use a long word when a diminutive one will do. Proofread carefully to see if you any words out. Take the bull by the hand, and don't mix metaphors.