Ask employees to pull out all unused office supplies in their desks and file cabinets and put them in a box to be picked up. Hire an intern (college student) to go through all the empty desks, offices and supplies cabinets and pull out the unused items that have accumulated over the months and years. Toss the catalogs because they encourage buying items not actually needed or are overpriced items. Create a list of “approved items” that can be ordered. Anything else that is not on the list going forward will not be ordered without upper management approval and multiple signatures. You may consider donating supplies to non-profits for tax deductions. You may try to force current vendors to take back unused items (partial credit, credit for future purchases, etc.). If you start this process, you will cut the purchase costs simply by limiting what can be purchased without going through a hassle.