6. Post-It Notes
Post-It notes are key to any office organization problem and the little sticky wonders are also great for many other purposes. In 1968 chemist Spencer Silver discovered low–tack adhesive while working for 3M. The adhesive was just strong enough to keep the paper on to whatever surface necessary, but didn’t leave a residue or tear the paper during removal. At first, the adhesive wasn’t an obvious sell and he couldn’t find a purpose for it until having a conversation with a colleague and they decided on Post-Its.