Most products need to be sold in large volumes by many distributors before they turn a profit. Chances are the product you sell is also being pushed by hundreds or thousands of other affiliates. In the end, many business buyers will simply click to the main corporate site to make their purchase. Your best bet for starting a small Internet business and earning a living online is to sell a service to businesses. Unlike products, it is hard to mass produce a service.
Most service providers find their competition is relatively thin.
This is especially true if you provide a very specialized service or do your job in a particular way that is hard to duplicate. Because services require time spent by an experienced expert, rates can be high, especially for business customers. But I'm not an expert in anything people on the Internet would want to buy, you exclaim. Sit down with a pen and jot down all the things bosses have paid you for during your work career. Add to your list things you have done on your own time that friends, neighbors, or co-workers have felt were valuable.