Head on over here and see how many of these things you call “things”.
I personally already knew the first one. I learned it literally a week ago, from White Space is Not Your Enemy.
…And that’s all I knew.
Its interesting to think how certain people would know some of these, depending on their profession. For example, a manicurist probably knows the second one. A carpenter might know number 6. A shoe salesman might know number 12, and maybe 25.
I myself am no stranger to number 20 – although I had no idea it had a name.
Which ones did you already know?