I often rabbit on about the advantage of textile practitioners keeping a visual journal. Some people develop fully decorated pages while others use it to record fibers and fabrics they are working with, dyeing notes, articles they find online, notes about websites, addresses of suppliers, costs of projects, samples and experiments and the progress of projects they are working on. There are all sorts of small bits of information about, processes, materials, care of textiles, other ideas that during the course of working you may want to keep track of in one place instead of dotted about the place.
For some one of the first things they do is to cover the visual diary. It sort of marks it out a special book. I have not seen knitters do this but Spun ezine has published directions by Tara Swiger for a Sari Silk Journal Cover