Limit the number of advertising units that you carry on the page

Whilst Google will allow you to have three advertising blocks on each page, my testing has indicated that, in the vast majority of cases, you should include not more than a maximum of two ad blocks as a maximum. In fact, what you’re doing if you include three blocks is reducing your income, rather than increasing it. If three ad blocks feature 12 individual ads, then those are ads from the 12 advertisers who are willing to pay the most to Google, and, by extension, the ads shown in the bottom advertising block are the ones that will pay you the least.
Every time someone clicks on one of those ads, they will most likely not make a second click on one of the higher ads, and you are, therefore, effectively trading possible clicks on the ads that pay you most for clicks on those that pay very little.

Leave your visitors guessing

Leave your content materials unfinished, add an ‘ellipses’  (three dots at the end of the line of text) and then show AdSense advertising directly underneath:

This could suggest to the reader that they have to click on the ad underneath in order to continue reading the content, and this will undoubtedly encourage some readers to click on these ads. This technique does not  violate Goolge’s terms and policy.