If you have built up an email list, you could also promote your affiliate offers via email promotions. Just make sure you build up a relationship with your audience first instead of going for the hard sell straightaway. The emails you send out must contain your affiliate links to products so when your audience click through. the sale is attributed to you.
Most businesses require startup fees as well as a cash flow to finance the products being sold. However, affiliate marketing can be done at a low cost, meaning you can get started quickly and without much hassle. There are no affiliate program fees to worry about and no need to create a product. Beginning this line of work is relatively straightforward.
Click on a ClickBank Marketplace category that interests you to load the list of the products listed in that category. The displayed clickbank products will be by default sorted by their popularity rank with the most popular products being displayed at the top of the list. Use the provided drop down box to change the default sort order to be gravity, percent per sale, earned per sale, and etc.