Don't forget to tell your readers about your need for news in every newsletter issue. For many, writing is the hardest part of newsletter work. Writing is work. Editors often think good writing comes naturally - on the contrary, writing is a learned skill and requires constant practice. Good writers write, rewrite and rewrite again.
Good writing reflects a personal style.
It must be as simple and direct as speaking. Read aloud some of your own writing. Readers are impatient. Your job is to get information to the readers before they get your newsletter to the wastebasket. Keep sentences, paragraphs and stories short.