The first thing I would do is head over to Clickbank and browse all the different markets that are there.
For example, if we browse the Sports section category of Clickbank we can see that there are several products that appear on the first page. These focus on Basketball, Golf, Tennis and sports such as Martial Arts.
Remember these are huge markets and people are willing to pay a lot of money for these products to help them “improve” their game.
Facebook is not just a place to make friends anymore. It is a place where you can actually promote products, get feedback and look for products that cater towards a certain market.
The more pages you have for different niches the more money you will make – simple.