Use the same form of comparison words within a sentence. For example, "He likes playing and running at recess," instead of "He likes playing and to run at recess." Another example is to use "Her details of the events were recounted correctly and clearly" instead of "Her details of the events were recounted correct and clearly."
Keep nouns, adjectives and verbs constant in a descriptive list; don't mix them. For example, "He was full of greed (noun) and ignorance (noun)" or "He was ignorant (adjective) and greedy (adjective)" is better than "ignorant (adjective) and greed (noun)" because the last one mixes an adjective and a noun.
Make sure the verb usage is balanced out. If you use a verb with one word, use a verb with all of the words on each side of your "and," "but" and "or." For example, "Newborns frequently cry and restless at night" is better phrased as "Newborns frequently cry and are restless at night" because both sides of "and" now have a verb.
Place your connecting words so that they come before both of the ideas that you are connecting. For example, "She not only was the best person on our team, but a good friend too" would be better phrased as "She was not only the best person on our team, but a good friend too" because the connecting words "not only" is placed so that it comes before both "was the best person on our team" and "a good friend too."