Key to success on affiliate marketing:

Well, in affiliate marketing you will  meet with two types of people. One who is sitting on the great success and another who has failed to make some decent revenue from affiliate marketing. 

There are many people who have been making huge profits and made a history with affiliate sales. Now, if you study on their affiliate marketing policy then you can easily determine that- there is only one key to success in affiliate marketing. 

And, the key is- Make people trust on you to sell an affiliate product. 

How to do this:

Write the relevant article about the affiliate products which you want to sell to your readers or customer OR sell the relevant affiliate products comparing your article. 

Remember relevant is the key