Check sentence length by counting the words in each sentence. If the difference between the longest and the shortest sentences is fairly small—say, five words or fewer—try revising some sentences to create greater variety. Should two or more short sentences be combined because they deal with closely related ideas? Should a long sentence be split up because it contains too many important ideas? (52a)
Look at sentence openings. If most sentences start with a subject, try recasting some to begin with a transition, a phrase, or a dependent clause. (52b)
Vary types of sentences to make your writing more interesting. Do you use simple, compound, complex, and compound-complex sentences—or does one type predominate? Would a particular declarative sentence be more effective as a command or question or exclamation? Could you use a periodic or cumulative sentence for special effect? (52c)