It seems like not a week goes by that I don’t see affiliate program owners on the boards looking to hire dependable, good designers to full time gigs or for long term projects. I know some designers can be flaky and others are just no good so finding a good designer for them can be difficult. 

So if you want to always be working learn how to do graphic design and get good at it. There are many people, myself included, who know how to do a little bit with Photoshop, but nothing major so we hire designers to do our good stuff. If you can get good at this finding steady work should not be difficult. Also there are many programs out there that let you design your own FHG templates and site tours and submit them for the program to use. If they use your templates or tours you get a commission every time it makes a sale. I know a few designers that make some decent extra money doing this. 

Here is a good place to start. http://www.forwebdesigners.com/ This is a great site that gives you all kinds of tutorial and great ideas. So get in there, get some info and get some work!