how to earn from Clickbank? Any ideas?

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I have heard a lot about clickbank. Its a place where you can sell digital products and earn money from it. But where do we get the products. I checked my account and found many links that you can promote and earn money. You get upto 60% back on sales you do. But this is other issue. How will you create your own product? And do you need a website or something? Ne kind of ideas will be appreciated. Thanks in advance.