Welcome to the world of smartphones! Some great uses have already been mentioned here. I keep a picture inventory of my fabrics on my smartphone. I scan each fabric purchased after I bring it home and transfer the image to a folder on my computer (and on my phone) called "Fabric". In my Fabric folder, I have subfolders for regular quilting cotton and for flannel so I can tell the difference between them. I have a clear ruler on the bed of my scanner so I can also judge the size and scale of motifs when I look at the images. (You could also just take pictures if you don't want to go to the trouble of scanning.) It's amazingly helpful to be able to flip through images of my stash when I'm at the store trying to figure out if I have something that "goes" with my contemplated purchase. And more than once it's kept me from buying more of something I like but had forgotten I already have...