Whether you are promoting your own products or someone else's through ClickBank, you'll want to make sure your website is functional, error-free, and sales oriented. You will also want to begin capturing visitor's information as soon as possible by offering a newsletter. This helps you build a dedicated audience to market all of your affiliate offers both now and in the future. If you still have questions about using ClickBank, check out ClickBank University. They offer free videos and tutorials that will help you get set up so you can start earning revenue.
The money is most certainly in the list. If you're at all interested in online marketing, setup email software and create a lead magnet that you can use in your sales funnel. Then, build up that list. It's often said that you can expect to earn about $1 per subscriber per month. If you have a list of 10,000 subscribers, that means you can earn roughly around $10,000 per month. You will need to deliver value and not pitch them on every email, but it is a very achievable goal in a short period.