The final major means of making a saving is to buy everything in one go
. For a start, many online office supplies retailers offer free delivery on orders over a certain value: so by buying enough to qualify for the free delivery you are already making a saving. In addition to the free delivery, for the most part buying items in bulk results in a lower price per unit due to the phenomena known as economies of scale. Don't go overboard, or buy more than you're likely to need: but aim to buy all that you're likely to need for the foreseeable future and you'll notice the savings immediately and the benefits for months to come.