Adsense.

Adsense is probably one of the easiest ways to monetize a blogspot blog, at least in terms of setup and maintenance. Blogger provides a widget where you can enter your Adsense account details and choose the ad format. You can then position the Adsense widget wherever you like using “Add and Arrange Page Elements” on the Blogger user interface. There is even an option to display Adsense ads between posts.

There is still limited flexibility when using the Adsense widget though. You can’t position the ads inside of your posts. However, if you are comfortable with HTML and CSS you can position your ads by editing the Blogger template. You can also show different sets of ads on post pages to what is on the home page. For example, you might want to position ads between posts on the main page, but inside the post on post pages.

I wont go into the details of how to do that here. I’ve managed to display Adsense ads most place I’ve needed to using a blogspot blog so let me know if you need some pointers.