The Million Dollar Challenge!

Is there a substantial amount of articles that can be used as newsletter or blog content?

Because you will likely know very little about the niches you chose to target and because writing quality articles is a laborious process, you need to make sure there is a steady supply of article content available for your use.

Ezinearticles.com is the premier article directory and has more quality articles then just about any other directory I've encountered. You can find articles for your niche by either browsing the main categories (which will yield the highest number of articles) or typing in your main keyword into the search bar.

If you find more than a few thousand articles then you should be good to go. Be sure to actually read a few of the articles to make sure they are actually quality before you use them for your blog or newsletter.

Once you've found a niche that passes all 7 tests you're pretty much in business and can move on to the next step of setting up a profile for this niche market.

If for some reason you are unable to find a downloadable product to use as a giveaway item to build your list but could find quite a few articles at Ezinearticles.com, you can always build your own info product by putting some of these articles together as an ebook and paying $20 or $30 for an ecover.