I just found out ab
out the Google Wonder Wheel.
For anyone not familiar with it,
1) Do a Google search on any keyword in your niche or area of interest.
2) Click the “Show Options” button that appears in the horizontal bar above the results.
3) Locate “Wonder Wheel” in the sidebar of the resulting page and click on it.
4) The Wonder Wheel shows up with your specific Keyword in the center and related Keyword Phrases in nodes surrounding it.
5) Click on any node to drill into it. That Keyword/Node becomes primary and you get a new set of keyword phrases related to that node.
This seems to be a good way of accessing the Long Tail keywords & phrases that Google knows about and that are related to your niche.