This page lists several methods to generate income working freelance.
These are not get rich quick schemes, and you probably have everything you need to get started.
You probably already do most of these thigs, but you just don't get paid.
The most important point is that you should choose something that you like to do, and it should generate a passive income.
I've tried a lot of different programs, and most of them are from people who are just reselling 'get rich quick' information packages.
Affiliate sales programs, in particular, tend to sell well, but they really don't offer a very interesting package.
You'll be far better off selling your own, original product.
Electronically deliverable product are high profit margin products.
There's a list of links here.