This is a technique that I've used in a project that I've created as a GDT assignment for Mon Scrapbook.com. I've used some Tim Holtz's idea-ology border masks and start masking on all four edges of the paper. In my sample above, I've used two different border masks and overlap them a little while masking. I've also used different shades of distress ink to create some depths to it.
Isn't this very easy? Try it and I'm sure you'll be blown away with the cool effect.