The fate of every opportunity you get in life hinges on whether you listened or not. This simple statement cannot be better explained than the story of the invention of those yellow, sticky pieces of paper which hold your notes - the Post-it note. In 1968 the Senior Chemist at 3M, Dr Spencer Silver, was trying to develop a super-strong adhesive for spacecraft. He failed. Instead, he created something seemingly useless but somewhat peculiar - a weak adhesive that barely stuc