Store them in a cool and dry place away from direct sunlight or heat sources, which may cause fading or warping of the paper. Avoid folding or bending them excessively, which may cause creasing or tearing of the paper. Use a blotting paper or a sheet of scrap paper under your writing hand to prevent oil or dirt from transferring to the paper. Use an eraser gently and carefully to avoid damaging the surface of the paper.