I have a notebook that I keep by my machine. Anything I need to write down, I write it here. Lots of calculations, like if I'm trying to figure out how many strips to cut for sashing. I'll just write the name of the quilt like 'Sopie, pink princess' and then the calc. Don't know how many times I've referred back to this stuff. Something comes up and I don't cut the strips etc. Also do sketches in here. Just do page by page, no real organization but it's all in one place. When this notebook is full, I'm going to make sure my next one is gridded rather than just lined, for better sketches.