E-newsletters and blogs have a lot in common, as Nick Usborne describes (in an e-newsletter about writing; subscribe here):

1. Good newsletters and blogs seek to engage your attention at a personal level.
2. Good newsletters and blogs both deliver timely information.
3. Good newsletters and blogs expand their readers’ world with outbound links.
4. Good newsletters and blogs both invite interaction.

I have a great fondness for newsletters, which make up a large part of my freelance writing business, so maybe that’s why I feel comfortable with a blog.

The big difference is that blogs don’t necessarily have a set schedule and a deadline the way newsletters do, which may be why I don’t post as often as some bloggers do. And given my track record so far, I’d say you are better off setting a schedule for blogging and sticking to it, just as you would with a newsletter.