Try to store your materials in a cool, dry place, protected from light, sharp objects, and pests. Don't wedge things together. Store papers and pictures vertically rather than flat. Pens, pencils, and printers are not all alike. Others cause damage.
Pencils are better than pens most of the time.
Use a soft No. 2 pencil, writing lightly. Adhesives and such. Staples are acceptable. See what's wrong with tapes , strong , rubber bands , and paper clips , on the UIUC Library's preservation page. Don't force materials together Water damage.