The simplest way to make money with your website, is to join an Ad network. It should however be said, that you need a lot of traffic to make any decent money on online advertising. For example, its unlikely that you will earn anything significant on your personal site.
This Tutorial will most likely not be kept up-to-date as much as other content on Brugbart. Its mainly intended to give you some ideas as of what you can do, and what to be careful about.