Financial services provider, Wells Fargo, launched their affiliate marketing program with the goal of expanding credit card acquisition beyond current customers of the bank. Rakuten Marketing designed an affiliate prospecting program that focused on building strong relationships with publishers and educating them on the products offered. This approach was aligned with creating compelling consumer-facing offers that would appeal to a publisher’s audience.
Find a profitable niche. Starting with your interests, write down as many niche ideas as you can. Think about topics people might search online. Ideas include passions (like surfing or body building), fears (like spiders or speaking in front of crowds) and problems (like getting out of debt). Do keyword research to see it others are interested in the topic. Find out if a domain name is available that matches the keyword 100 percent. 
Now most affiliate programs have strict terms and conditions on how the lead is to be generated. There are also certain methods that are outright banned, such as installing adware or spyware that redirect all search queries for a product to an affiliate's page. Some affiliate marketing programs go as far as to lay out how a product or service is to be discussed in the content before an affiliate link can be validated.
Beyond your time and patience, affiliate marketing implementation requires resources. Having a fully developed program dictates that you design creative and sales materials to provide to your affiliates, write guidelines and tip sheets, help those who may be less tech-savvy, alert affiliates to new products and promotions, etc. Once your program grows, you’ll also probably find it necessary to hire an actual program manager to run it. This, of course, doesn’t include the cost of commission to both the network/platform and the affiliates, which needs to be high enough to incentivize publishers to sign up for your program and promote your products.
Next, you’ll want to pick a WordPress theme from somewhere like ThemeForest, Elegant Themes or OptimizePress. This is the barebones design of your site, which you can then customize with your own branding, copy, and images. That being said, you don’t want to cheap out. It costs less than $100 to buy a theme that will make your website look professional (and you can upgrade to a completely custom design once you get the business going).