Like Anne (Boston1954) I keep all my information in digital form. For each quilt I make, I have a folder (on the computer) with pictures. I include the date in YYYY_MM_DD form in the beginning of the folder title so it's easy to sort in order of when the quilts were made. So one folder might be called "2014_01_10 scrappy log cabin on point". I also keep an Excel spreadsheet with the date finished, size, recipient, list of shows the quilt has been in (if any), and any other pertinent notes. I haven't been keeping track of batting, but I think I should. (And yes, my computer is backed up regularly.)