Reward your readers for every small investment of their precious attention. Capitalize on connections. Live hyperlinks to relevant sites are the lifeblood of online publishing. Don't be afraid to include links in your online content. Also, it's usually better to present links in context, rather to segregate them all at the end.
Online audiences love sites that are good guides and filters.
In my experience, it is usually more effective to publish content by e-mail than on the Web. That's too much to expect from most Web users. Start simply and grow gradually. Too many online content publishers bite off far more than they can chew. Most media ventures take a long time to develop and become profitable.