The design should be simple. Don't contradict the message of your text with the message of your design. Harris gives an example of a newsletter planning form. He also reminds us about using time saving devices such as templates and macros. One aspect of newsletter design not discussed in the Will-Harris article is the use of color.
Paper is the first color issue.
You can try to use a bright color that will catch the reader's attention. The use of a color printer can give you many new design options and can revitalize a white paper newsletter. Cost of course will be a factor in how much color you can use. Take a look at some library newsletters. See what you like and what you don't like.