Also bear in mind, when you’re choosing words and stringing them together, how they sound. This may seem absurd: readers read with their eyes. But in fact they hear what they are reading far more than you realize. Therefore such matters as rhythm and alliteration are vital to every sentence…If all your sentences move at the same plodding gait, which even you recognize as deadly but don’t know how to cure, read them aloud. (I write entirely by ear and read everything aloud before letting it go out into the world.) You’ll begin to hear where the trouble lies.
Wisdom from William Zinsser on rhythm and how your writing sounds. Why I say: Sound Different.