The Most Valued Google Adsense Keywords

When talking about Google Adsense, honestly, what's in my mind is how to maximize the earning. Of course, with a right way. It means, we must give a great keywords, the right ones, so it will give a high revenue. The question is, what is it? Is it the biggest mystery ever? Then, lots of site offering the high payable keywords of Google Adsense. Again, it is not for free, and also not cheap. This mean that you are doing a bargaining or a gambling. To trust to buy the keywords or not, and how deep is your pocket is. Lots of keywords that can be possible. Lawyer, attorney, construction, heavy industries, computers, earn money, download, software, freeware, blogging, domain, freelance job, foreign exchange, betting, gadget, mobile phone, online business, or just selling traffic. There's lots, too many possibilities. But, the interesting part is, let it flow like what it supposed to be. And let it still be a mystery.