If you haven't already checked out this email software, I strongly suggest you do so. Many people with access to email do not have access to the web, and you are thus missing out on potential subscribers. But not providing simple removal instructions on your mailings is a good way to make enemies out of frustrated subscribers. Pumping out material for e-zines on a regular basis can be made easier a number of ways. Like thinking of yourself as an information processor, not creator.
Folks appreciate theory and tidbits of useful information.
But they gobble up real-life accounts, experiences, and beliefs. Consider that YOU are probably the easiest thing you can talk about. The neat thing is, done properly, people actually look for this. If you think about it, armed with the Internet, folks can pretty much dig up the same theories and tidbits of info themselves. They're looking for something more.