Here’s one of the best articles ever on email newsletter writing. How To Build a Successful Email Newsletter on Problogger points out that you need to start out by defining what you’re trying to do with the publication, and letting the potential readers know this. Then you need a voice, and a clear idea of the value you’re offering the readers (in exchange for their time). Your content needs to be scannable, have trackable results, and good subject lines. Finally you need a good distribution service, and a reliable opt-in/opt-out procedure. Don’t miss the three extra tips at the end, either.