Niche Research Help

Hi,

I'm looking for the best method to find a niche that can generate 1-5 dollars a day in adsense or other revenue sources.

Here is what I'm looking at...

Micro Niche Finder
Market Samurai
Google Keywords Tool
Copying A Site from Flippa

What do you think are the best and do you know of a training course on any of these methods.

Thanks,

Craig