I keep a running spreadsheet of the quilts I make, (mostly) It includes the pattern name, brief description, general size. start and finish date, who the quilt was for, colors, how it was quilted, new techniques used and any other little notes that seem pertinent at the time. I also try to photograph them, and post on my pinterest board, but I often forget to photograph them. It's hard to get good photos indoors, and I often forget to take them out on a nice day.