Use the active voice whenever possible. Active verbs are more vivid and effective than their passive counterparts, and therefore are more likely to engage readers.
Put the subject up front. A long introductory phrase distracts from the point of the sentence and the writing loses its sharpness.
Write clearly and concisely. Too many writers overreach by writing lengthy, flowery sentences. Get to the point quickly if you want to hold readers' attention.
Avoid redundancy. A well-crafted sentence conveys an idea once and makes it stick. There should be no need to belabor the point.
Consult a thesaurus. Make your sentences pop with interesting synonyms for your most commonly used words. This carries the added bonus of enhancing the quality of your work and expanding your vocabulary for future writing.