Creating a product and starting a stream of passive revenue depends on 3 things:
1. Create a product that people want to buy (ebook, CD, DVD, etc).
2. Describe your product in a way that makes people want to buy it.
3. Get a SIMPLE website and send traffic to it. Traffic is just PEOPLE who come to your site looking for answers to a problem -- the type of people that you probably help every day in your business.
There are dozens of ways to get more traffic, which I will be focusing on in the next month. There are many free ways to get traffic, and ways to spend a little bit of money to MULTIPLY the traffic you get. The cost will be offset by increased sales, if you have done #1 and #2 properly :-)
It really is that simple -- create your product, describe it in a compelling way that makes people want to buy it, and get people to come to your site, so they CAN buy it.