Post-It Notes, which are adhesive notes, were invented while looking for a way to improve the acrylate adhesive found in tapes.
Image from Wikimedia public domain.
Post-it Notes (Hover)
Post it notes are one of the most irritating inventions maybe because some people overdo its usage. While they may be effective for certain things they aren't for others and people should get a clue. A critical message like "Wet paint" should not be made on a small post it, what are they thinking?
Obviously, you've been hurt before...
It's amazing the sheer number of things we have today that were discovered as an accident while looking for something else. All it takes is the right person in the right place to come up with something that can touch our lives every day.
I love Post-its and when they are multi colored I use them even more. I have a clear plastic container with all varieties and sizes. I use them not to forget stuff during the week. I've color coded it and put it right by my mirror.