Credit Card Processing. Suppose you work for a company that sells credit card processing services to retail merchants. When a merchant signs on with you, you earn an up-front payment and continuing residual payments based on how many sales that merchant makes with your service. The higher the merchant’s sales volume, the bigger your residual payment – and the more merchants you sell your service to, the more of these payments you can collect.
Although this article has been written in 2007, now in Feb 2014, I still find it full of great advice and tips. What I learned from this article is that when writing a review I should focus on how this product helped me achieve X instead of simply repeating and enforcing the features and benefits of the product that can also be found on the sales page.