Roger C. Parker at Squidoo makes a good suggestion for writing a newsletter that could be applied to any project:
Experience has shown that, before creating the first issue of your monthly One-Page Newsletter, you should identify the topics of your first 12 issues. Identifying the titles of upcoming topics puts your mind to work. While sleeping and driving, your mind will be unconsciously gathering ideas for use in the future issues. As a result, when you sit down to prepare each issue, you'll be amazed at how much work has already been done!