Check out the website reallygoodemails.com for some fun examples to get your creativity flowing for your next enewsletter. The site has different categories to browse layouts, images, headlines, colors, etc.
PRO TIP: Any time you're sending out content to your fans and supporters, be sure that you're following your own brand guidelines. (You have a brand guide, right? Message me if you need help!) No, you're not stuck with plopping your logo and using two colors for everything you send out. It just means that your communication should MAKE SENSE with each other so if someone clicks from your enews to your website they know immediately that they are in the right place.
What kinds of things make you love or hate an email newsletter?
The Best Email Designs in the Universe (that came into my inbox)