Microsoft.com has all sorts of templates including newsletter ones. You can preview them and then dowload the one you like best. And then all you have to do is just put in your text and maybe some clipart and you're done. I do the newsletter for our PTO and that is where I found the format I liked. Here's the direct link to the newsletter template page: http://office.microsoft.com/en-us/templates/CT101043281033.aspx
Hope this helps!