tops30 has give a good example but i think it's the first step of banning from adsense or the other ppc program
Those high paying keywords are of no use unless your adsense pages get ranked for these EXACT keywords. And keep in mind that those 'high-paying' keywords are generally very competitive,and hence,harder to rank than with long tail keywords. I always create my pages using long tail keywords and they get ranked in google and I get clicks as well Dick
i agree with chintu... it depends on your targeted keywords! get keywords that is very related to your site....