Have you checked out the freelance writing opportunities at About.com lately? About is continuously looking for Guides in different areas of interest.
Here are just 5 of the subjects they are accepting Guide applications for:
Mom Recommends
Teen Health
Budget Decorating
Sugar Free Cooking
Autism
And there are many more.
To become a Guide requires a step by step process, but once you get approved and become an official guide with About, you will make a nice steady income from home.
You can see the all the topics available for applications at About.com here.
Good Luck!
