I've read a few articles that have the same theme: "I've used all my GOOD photos, and don't have any travel plans... WHAT do I submit???"
All you have to do is look! Wherever you live is unique and exotic, to someone from the other side of the world! Your life, your stuff, your house-hut-home-apartment-tent are all one of a kind environments that are just waiting to be mined for images.
Please trust me on what I'm about to say... The ability to find usable images in your own backyard will make you a better photographer the next time you're in an "interesting" place. When I'm sent on assignment, I can't guarantee I'll have good weather or enough time to shoot the stuff I THINK should be shot. However, I still have to bring home the images that make it worthwhile to send me cross-country, or cross-ocean! That's when the skills you'll learn this afternoon in your living room become so valuable.
Your best selling images are waiting to be captured. Now sign off and go get them!!!