If you are looking for a product to sell on the internet, you can start by marketing eBooks. eBooks are digital information products or files that can be downloaded instantly, on the internet. You can get eBooks to sell as products by creating your own or selling for others, that is you become an affiliate (affiliates earn commissions/fees by selling for others on the internet).
To make money online, you will promote your eBooks on available ad media on the internet. If you are on a shoe-string budget, you may want to start your promotions with free advertising methods/media like article marketing, video marketing, viral marketing and social bookmarking.
As a product owner, you will need to create the ads and content you will need, for the promotions of your eBooks, and if you have set up an affiliate program for others to sell for you, you will also have to create the ads and content for your affiliates to use for the promotions of your eBooks too.
As an affiliate, for marketing eBooks, you may get an ad/content to use for the different ad media you may want to use for promoting the eBooks you choose to sell, from the product owner.
Article marketing is the act of using articles to market and promote your eBooks. You will use keywords related to your niche to create targeted and relevant articles, you can post to other websites allowing you to post your articles for free on their sites on the internet.
Video marketing is the use of videos for promoting your eBooks. You can create videos and post them on free video websites like YouTube to drive traffic to your website or product.
Viral marketing involves encouraging people to pass your messages along to others. This is most commonly done with the use of free eBooks containing links to your website or product.
Social bookmarking is the act of bookmarking web pages on social bookmarking sites. To promote your eBooks then, you can create content on your own website and bookmark them on the social bookmarking sites too.
Whether you are an affiliate or merchant, you will need to create the content (articles, web content, video and eBooks) you will need to use to promote the eBooks you sell, through these advertising methods/media.
You should also create targeted content on all the media you use (not only targeted articles), for your promotions. You can do this by getting keywords (or search terms) related to your niche through the use of a keyword tool like Google AdWord Keyword Tool and use them in the headlines, body text, and descriptions of the content you created for these media. Doing this will help you to get better search engine ranking on the internet.
You should also track the results you are getting from each one of these medium, you can use a free software like the Google Web Analytics software to do this. Tracking your results will help you to know what is working for you.