High paying ads keep rotating in different add units. So stop complaining of days with less income. Try to display 2 or more add units(Horizontal, vertical, rectangular etc) and u can see stability in your income. Go for channels, you will know your website better.

2) Try to concentrate on the content specifically in the area, your website is all about. Donot run after high paying keywords. If they happen to be in your area, you are lucky. Refine, re-refine the content, youradsense ads get better abd better and you will see higher CPC week by week. This has happened to me and today, iam receiving clicks which are worth $3-$4.

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