"RSC" can refer to a quilting project (Rainbow Scrap Challenge) or packaging design, but a DIY cover project likely refers to creating a cover for a journal or notebook using various methods. Common DIY approaches include using fabric, old book pages, or cardboard panels to construct a cover. You will need to measure your journal and select your materials, which can range from scraps and decorative fabrics to recycled materials, to start building your personalized cover.