In order to successfully run an office, you need office supplies. But which ones are the most important to an efficient workplace? Of all the office supplies out there, which ones cause an uproar when it runs out? Paper supplies, sticky notes, filing organization, presentation boards, envelopes, and other mailing supplies are some of the most important supplies. Coffee supplies, ink cartridges, sellotape, staplers and staples, and cleaning products are also imperative to keep on hand.