I've been doing this with my niche sites for years, and it works really well.
What is it?
Building interactive tools, quizzes and calculators.
Here's a good example: BTEC grade calculator
The same guy has also made a student loan calculator.
These things are great. They're fairly easy to make. If you know or want to learn PHP or another programming language you can make
them yourself. If not then why not design something on paper then hire a programmer to make one for you?
Once your tool is up on your site then you'll often find you get natural backlinks from all over the place. Especially if your tool is unique and doesn't have any similar offerings out there.
So what interactive things could you make in your niche(s)?
More threads for you to read and post comments on.
Love Facts and Figures? Here's some data about Niche Laboratory usage.