Looking for more inspiring newsletter designs? Here's a collection of 15 newsletter designs posted at Dezine HQ. Nice variety. One thing you'll notice when browsing these designs is that there is no one way to create a newsletter. And the newsletter design advice offered in the article ties in quite nicely with my newsletter design clinic and other articles I've written on designing newsletters:

• "It should not look like pages have been thrown together, should not be cluttered with a lot of images and photographs and definitely should not have different fonts for the content." and "Be conservative in using boxes and frames."
  Do this with the advice offered in: Newsletter Design Clinic: Cut the Clutter

• "A good newsletter design is one that presents the content in a consistent manner. You can make use of grids for consistency. Using templates, footers and headers will add to consistency."
  Do this with the advice offered in: Newsletter Design Clinic: Consistency Organizes and Unifies

For more on best practices in newsletter design: Newsletter Design Clinic: First Impressions | 12 Parts of a Newsletter | How to Create a Newsletter (More Tips and Tutorials)