Once you have decided to use Clickbank for your Internet marketing business you will need to open up an account. Though the process is the same, it is a good idea to know beforehand if you are going to be a product seller or an affiliate. If you are going to be an affiliate, you can open up the account at any time and save it for when you have found a product that you want to sell. When you are signing up as a product seller, however, it is best to wait until you have a product for reasons that will be discussed momentarily.