I put the symbol on my shell prompt line, when there's a readme file found in the current directory. Just a reminder, especially for directories, in which I'd put the readme file myself, but then forgot about it.
https://github.com/rybak/scripts/blob/master/config/ps1_noti...
It works together with very dumb script in $PATH, which prints a readme file if one is found in the current directory.
https://github.com/rybak/scripts/blob/master/commands/readme