You help to save their reading time as they will get to know where to look for information when each issue arrives. Remember to choose appropriate graphics, don't just put something in to fill up the page. Graphics should lead the reader's eye into the page and the copy, rather than off the page. Remember to be generous in your space. The purpose of your newsletter is to communicate, not to get the most on a page.
Good design begins with a good format.
Most newsletters are either a one or two column format. Three or more columns usually requires typesetting by a printer which is an additional cost. One-column format is best suited to typewriter production. This format benefits more from the use of lines and borders. A two-column format looks clean and is relatively easy to do on a typewriter.