Blog or Newsletter?

If you blog you can send a newsletter of the posts. That way you only write it once.

Why is this an either/or?

I use all the content I create three times over.

I start by publishing it on my own blog, to provide "content" and to secure the initial indexation-rights for myself. Then I have it as widely re-published as possible anywhere relevant that I can (that's called "article marketing" - and as an afterthought, at the end I even dump a copy of it in "Ezine Articles" directory, just in case anyone else wants to take it from there - with my link - and publish it some more), and then I re-use it all for my autoresponder series to send out to my subscribers.

There's no point in having good content and not publishing it myself, on my own site. And the rest is how I generate traffic and send content to my subscribers. I need all three, but I don't want to have to write more than three articles per month (per niche). That's plenty! Writing an article is a "big job", for me - that's real work!

It's never caused me a real problem that I'm aware of, re-using all the content.

"Getting traffic via the search engines" is the least of my concerns. I can't make a living from that traffic. (I do get floods of it, I admit - but it's crap traffic, by comparison with article marketing traffic. It's actually about 20% of my total traffic but only 3% of my income - that's how bad it is, by comparison!).

Yes.

But you'll (probably) need to offer more than just "a newsletter" to get many email addresses. A free report and a free newsletter subscription gives you a much better chance, if the free report is well targeted (or if the traffic is well targeted, if you want to look at it that way round).

I just divide each article more or less into two, myself.

I write 3 articles per month, per niche, and each article makes up 2 emails, and I send emails every 5 days, so it all works out "fairly well balanced".

The emails I send out are half an article, plus a bit on the beginning and the end (for "continuity") plus an occasional product-promotion, in about one email in three.