How established is your site/blog/social media following? Do you already have an audience of 1 million or are you just getting started? Early on in your affiliate marketing journey you will probably want to have multiple options to make sure you can cover a broad field. You might want to become an Amazon Associate as well as joining one of the networks so you will have a product link to drop into any posts you do. An easy place to start is to promote the services you are using if you are enjoying their product - web hosting or email management systems like Aweber.
Affiliate programs are arrangements where an online merchant that’s selling products pays an affiliate website a commission for any sales generated from their referral traffic. The affiliate website places affiliate links pointing to the merchant’s site to track transactions. Each agreement between an affiliate and a merchant features the commission structure and payout information.