I've been away at the wonderful SDA conference. I'm teaching Mix It Up- Mixed Media Collage. We're using all sorts of fiber and paper. On my supply list, I suggested bringing print-outs of one's work. These could be images of your whole piece, detail shots or even pix of painted fabric.
It's a great way to add personal touches to collage. And a terrific way to use the design element of repetition.
You can also scan parts of your work, change the scale and create print-outs in different colors or even black and white.