I do, it's best described as a 'stream of consciousness' thing. I was always jotting notes down here and there, and loosing them. So now I write everything down as I think of it. Names of books/magazines with quilts I'd like to do. Sites I want to keep. When I start a project, I start a new page date it, and write things down as I think of them. I also write all my calculations down. I can't tell you how many times I've figured out how many inches of binding I need for a quilt, then can't find the darned paper I wrote it on. Or the number of blocks etc. Or the size I cut the setting triangles. If I had a problem or a technique that worked well, I'll note that. It's not a memory book in that there's no photos of my quilts or swatches of fabric, but I do refer to it. I use a quad ruled composition book so I can also do some sketches of blocks. It's probably not the best way to organize things, when I'm looking for something I have to go page by page, but it's helpful to me.