Step 1 > Mosey over to Kindle... and type in a niche idea keyword for evaluation. Click on one of the books to dig deeper (ignore big brands and free books).
Step > 2 scroll down the page to see if the book is selling well. Looks like...
This one about earning "Passive Income" was under 50,000. meaning a lot of people are interested in passive income AND buying this book.
So this is a goer...
Optionally I would also...
Step 3 > Read the reviewers comments and note down what people like and dislike about the book.
Step 4 > Take a look inside to the contents page for further content, even sub-niche ideas.
Long short I looked at keywords such as "affiliate marketing" and "amazon affiliate" and not surprisingly found these are hugely profitable, but I was interested in going deeper and through reading book contents pages discovered "passive income".
And yes this keyword is also very profitable but maybe less obvious.
Clearly this technique is very focused on finding information product / niche ideas.
If you're more interested in finding physical products to promote check out this free training video here...
Have you got a favorite niche research technique?
Be great to hear it.
Please feel free to share in the comments below.