Check out Niche Ideas
. We made a private tool we've been using public. The monthly value is based off Amazon affiliate and we get a high CTR because we have some traffic redirecting. Anyway, the tool is free to anyone to use so check it out.
There is also a "HOW TO" pdf available that will explain in more detail: http://www.monstercashflow.com/pdfs/...iche-Ideas.pdf