5 When I was a boy, it was common practice to square up paragraphs. It is now known that widows – short lines – increase readership. 6 Set key paragraphs in bold face or italic. 7 Help the reader into your paragraphs with arrowheads, bullets, asterisks and marginal marks. 8 If you have a lot of unrelated facts to recite, don’t use cumbersome connectives. Simply number them – as I am doing here.