Timing...

If you catch yourself doing this:

Then it's time to retire with your dignity intact.

My younger readers may not know what the woman in the photo is doing.  She's applying an opaque white fluid (known as “white-out”) to her computer screen.  She's doing this because back in the old days, this is how she learned to correct errors when typing.  People used an antique device called a “typewriter” (a kind of combined printer and keyboard) to print neat text direct onto paper.  With a typewriter, the only way you could correct an error was to paint whiteout onto the mistake and then type over it.  There was no backspace key or erase key.  If you have trouble believing that humans actually used such primitive devices, or that such humans could possibly still be alive, please consult this article for more information on the subject...