Adsense make me crazy

I don’t understand how to maximize my adsense earnings.. I always try and try, read on other people blogs about adsense trick, reading in adsense forum Indonesian but I still not get how adsense earnings calculated.
I try High Paying Keyword, but it’s not working.. now I tested competitive ads filter and I still get low earnings.. 🙁 *laugh* at least I found the key some people say the good content of your website will bring more on earnings, but I’m not really sure if it works.. let me try some method again and I will report here.