I pin notes to cut pieces; I put cut pieces in zip locks; I keep a notebook. Since I only buy for projects, I go so far as upon washing/ironing, I label the various fabrics for the sections of the quilt...border(s); backing; block sections, etc. Sometimes I even have a hard time remembering from breakfast to lunch what I'm doing with things. Label, label, label. Make many notes. I'd be doomed otherwise.