I have a PDF with high paying keywords which I downloaded here somewhere. If you send me a PM I can give it to you.
They are not going to help you much until you have good traffic as well from specific countries. Otherwise you won't earn that much as shown there. - Mr.President -
target US traffic is best as they tend to click on ads. Check out Google on stuff like loans and insurance. My new 2 week old blogger blog got me $7.22 today
Yes, there are a few Google keyword tools that give you an idea of how much it will cost you to advertise for those keywords. With this information you can estimate how much the clicks for those keywords might pay out.
Dude dont go for higher paying keywords. I went that road, cant say it was a failure but not a success either. First of all most paying keywords are geo targeted. For example any kind of lawyers, if a visitor comes from particular area that advertiser is interested in, then you will get a lot for that click. But guess how many people are searching for that keyword in that area? Close to 0. Yes I get $3 clicks, but the traffic on those sites 2-3 a DAY. Forget about high paying keywords. Go for micro niche sites, target keywords with a lot of searches. It's much easier to get 100 clicks $0.20 each then 1 click for $5