Affiliate Marketing Secrets

Hi some clickbank question.
Do you need to have a website first when applying for clickbank affliate program?
Second, how do you usually promote clickbank products? Is it the same as Amazon’s products. I’ve heard some of their products are infoproducts so how can I promote this. Is it okay to approach it in a blog style promotion in my site. Also a good example of clickbank affiliate website is appreciated so I can sort some of my questions by looking at it.
Thanks. 🙂