I wanted to suggest an amazing book a read.
The book is called:
"The AdSense Code: What Google Never Told You About Making Money with AdSense"
It's written in a very simple language and helped me to raise my AdSense %CTR and the earning per click.
It was written by Joel Comm - an AdSense expert with years of experiance with making money by AdSense.
you can order the book from amazon with this link:
I personally think it's worth every cent...
I hope it will help you, the same way it helped me.
Please share your toughts and we all make more money.
All The Best,