So, I have to make a confession - I have spent ridiculous amounts of money learning about how to make money online so I never have to have a "real" job again, lol. So after a good amount of time paying for ebooks (I'm too embarrassed to say how much I've spent, so I won't, lol), reading, and observing, I do make money online, and this is what I've learned (this assumes you want a "set it and forget it" type online income - no inventory, customer service, etc.):
Start a website on a subject that people search for when they really need something - they have a problem and are looking for a solution. It needs to be rather specific. A website about "cars" is just too huge an undertaking. You've gotta drill down into a much narrower subject that has a strong following, like 50's collectors cars. You shouldn't just do "alternative health", you've gotta pick something specific, like "natural eczema treatments". It helps a lot if your domain name includes the key words your site is about.
Put up a dozen or so articles on your site addressing various aspects of your chosen subject. This is to pull people in through the search engines. Put up reviews of the products available that address the problem people are searching for. Review a few products on one page, you don't have to appear to have a preference of one over the other, just state the facts. People will trust you more if you appear objective. This also avoids you needing to know how to write any sales pitches.
Sign up for an affiliate account with all the products you are reviewing, and put your link in your reviews, so regardless of which review the person decides to go with, if they click through your page, it'll be your affiliate link. If they buy through that link, you get a commission.
Tweak your articles and reviews and submit them to free article directories like ezinearticles.com, and include a link to your website at the bottom of each article. You have to make them at least 20 to 30% different from the original so they'll actually show up in the search results. This gives you one way links to your website, and free traffic.
Articles shouldn't be more than 400-500 words or people get bored and quit reading. Use lots of paragraphs. Each Paragraph shouldn't be more than 3 or 4 sentences, otherwise people just see a huge block of text and don't bother reading it.
I'm posting this because it took me a LONG time to wade through all the crap to be able to get a "bigger picture" idea of what all these people were doing in common. You don't have to sign up for anyone's "program" or "system" in order to make money online. There are other ways of making money online that can be added into the above method, but the above summary is what I have gotten the most information on, and requires the least long term maintenance.