I use it for planning and designing. I found a composition book (you know the ones with the black and white cover) with graph paper inside instead of lined at Walmart. Only one there and have never seen another one since. I made a fabric cover for it and I use it for sketches, planning, designing, keeping track of measurements, etc. When I use it up, I don't know what I will use. Only drawback is that it is not perforated, so if you tear out a sheet, another one on the opposite side will fall out.