Each section of your cover letter should be short, but dense with information.
In today's digital age, most readers like a style of writing that presents a complete unit of information in a short block of text. Whether that person is reading an article, web page, or a resume, they would most likely key out once they reach a fifth line of texts without receiving a self-contained message to take from. To get around this obstacle, keep each paragraph and section of your resume short, but substantive. And break down complex paragraphs into smaller, bit-sizes pieces that are easier to read.