Analyzing lots of monetized blogs and web-pages i came to such a conclusion: there are two widespread ways to earn money with Google Adsense, here i call them "types of Adsense Psychology". They determine your content managment, SEO, Adsense Optimization and everything connected to managing you blog / page.
1. "Click Vampire".
This type of Adsense psychology means that you need your visitors just to come to your page, click ad unit and go away.
In this case you put large ad units at the bottom of the page and sidebar, make them look exactly the same as the content - including background color, font type, size and color, links color and so on. You make a lot of pages each optimized on a special, low-competitive search term. You may be not very serious about your content, sometimes your blogs may be splogs. You can even do spamming for your blog promotion.
The problems with such type of Adsense pscychology is that:
-In most cases visitors instantly understand what type of Adsense psychology you use, and they don't read or click anything, do not share your pages with friends and do not link to you from their blogs.
-You may have problems with SEO and even with blog-hosting, if your resource is connetcted to spam.
2. "Relationship builder".
This means that you are going to get the most of each visit to your resource - make visitor read 20 pages, link to you from all of his / her resources, submit your content to social bookmarking, sites, put you to favorites and so on.
The goals here are quality, unique and useful content and optimized, but not irritating ads.
You usually need a lot of time to build such blogs / pages, but as the result they are easy to promote, and you get a lot of thankful readers.
I'm going to write more articles on features of each type of Adsense Psychology, and i suggest you to analyze your pages and to understand, which type of Adsense Psychology is better for you.