Another way you can go is to create your own templates. You can base these around the types of articles you enjoy or you can visit other directories to see if you can find a general idea that gives you the ability to come up with your own template. Using your own articles may help you come up with your own templates as well. If your articles are along the same lines, you should be able to come up with a number of templates. Those will give you ideas for new articles and that for sure will help you get through your writer's block.
The design of newsletters has become easier than ever before with the help of easy to use newsletter templates, that are available to download on a number of websites. The problem then becomes the content, and how to fit this into the template in the most interesting and eye_catching way. There are a number of different techniques that can help you work out how to get your message across in the most clear and appealing way possible. It may be helpful to work out this content in advance before choosing the template, so that you can adapt it into the design model of your choice.